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1 |
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00:00:20,940 --> 00:00:23,780 |
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باسم الله الرحمن الرحيم السلام عليكم و رحمة الله و |
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2 |
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00:00:23,780 --> 00:00:28,720 |
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بركاته و أهلا و رحمة لكم جميعا ان شاء الله اليوم |
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3 |
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00:00:28,720 --> 00:00:35,440 |
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هنبدأ في محاضرة للطالبات بعنوان measure of lens |
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4 |
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00:00:35,440 --> 00:00:41,180 |
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power by a neutralization method, geneva clock |
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5 |
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00:00:41,180 --> 00:00:47,340 |
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method and lensmeter methodحيفضموها الطالبات كل من |
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6 |
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00:00:47,340 --> 00:00:54,380 |
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Esra El Efsin و Nesma or Nesma Abu Salem, Afnan |
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7 |
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00:00:54,380 --> 00:01:01,900 |
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Oman و Fatima Azam او Fatima Azam ان شاء الله، |
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8 |
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00:01:01,900 --> 00:01:07,530 |
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اتفضلوابسم الله الرحمن الرحيم، معاكم ميس مابو سهل، |
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9 |
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00:01:07,530 --> 00:01:10,930 |
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today we will talk about measurement of lens power |
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10 |
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00:01:10,930 --> 00:01:15,470 |
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هناك three method لقياس قوة العدسة، أوله طريقة ال |
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11 |
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00:01:15,470 --> 00:01:19,630 |
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neutralization، تالت طريقة Geneva o clock، تالت |
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12 |
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00:01:19,630 --> 00:01:23,690 |
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طريقة ال lens meter، من حيث الدقة ال lens meter |
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13 |
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00:01:23,690 --> 00:01:27,250 |
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أكثرهم دقة، بعدها بيئة ال Geneva o clock، ال |
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14 |
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00:01:27,250 --> 00:01:28,710 |
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neutralization هي أقل دقة |
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15 |
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00:01:31,610 --> 00:01:34,830 |
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الـ neutralization اللي هي طريقة .. طريقة المعادلة |
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16 |
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00:01:34,830 --> 00:01:38,750 |
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لمعرفة قوة العدسة two lenses neutralize each other |
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17 |
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00:01:38,750 --> 00:01:41,110 |
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when blessed in contact with each other so that |
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18 |
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00:01:41,110 --> 00:01:43,810 |
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the combined power of the two lenses is equal to |
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19 |
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00:01:43,810 --> 00:01:51,060 |
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zero أول حاجةيجب وضع الأحداث تان انه بحيث يكونوا |
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20 |
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00:01:51,060 --> 00:01:55,940 |
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متلاثقات مع بعض .. بحيث يكونوا متلاثقات العدسة |
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21 |
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00:01:55,940 --> 00:01:58,640 |
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الأولى اللى هى ال unknown lens الغير .. العدسة |
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22 |
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00:01:58,640 --> 00:02:02,000 |
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الأولى لل unknown lens الغير معروفة قوتها و العدسة |
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23 |
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00:02:02,000 --> 00:02:04,660 |
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التانية اللى هى ال non lens اللى بتنعدل فيها |
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24 |
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00:02:04,660 --> 00:02:09,530 |
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للحصول على no movementan unknown lens is |
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25 |
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00:02:09,530 --> 00:02:12,750 |
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neutralized by non neutral lens of equal power but |
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26 |
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00:02:12,750 --> 00:02:16,970 |
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opposite in sign وللتعرف على قوة العدسة نقطة قوة |
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27 |
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00:02:16,970 --> 00:02:21,370 |
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معاكسة لل sign الخاص بيها وفي النهاية العدستان |
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28 |
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00:02:21,370 --> 00:02:26,210 |
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بيكونوا عدسين بوار no movementis often used to |
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29 |
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00:02:26,210 --> 00:02:28,630 |
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noun the power of sphere and cylinder lenses |
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30 |
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00:02:28,630 --> 00:02:32,270 |
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تستخدم هذه الطريقة لمعرفة قوة العدسات السفير |
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31 |
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00:02:32,270 --> 00:02:37,190 |
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والسلندر وليه ماعرف .. وليه يجب تحديد .. وليه |
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32 |
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00:02:37,190 --> 00:02:40,930 |
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ماعرفت حركة العدسات انه يجب رسم ال optical cross |
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33 |
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00:02:40,930 --> 00:02:45,250 |
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لمعرفة هل هي العدسات سفيرة او سلندرإذا كانت كل |
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34 |
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00:02:45,250 --> 00:02:48,450 |
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خواص العدسة متساوية في .. إذا كانت كل خواص العدسة |
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35 |
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00:02:48,450 --> 00:02:52,490 |
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متساوية في كل المحاور بتكون العدسة سفير أما إن عند |
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36 |
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00:02:52,490 --> 00:02:55,430 |
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تحريك up و down و كانت تختلف عن ال right و ال left |
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37 |
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00:02:55,430 --> 00:02:59,610 |
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بتكون العدسة cylinder it used to measure the front |
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38 |
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00:02:59,610 --> 00:03:04,470 |
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vertex power of the lenses تستخدم لقياس قوة السطح |
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39 |
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00:03:04,470 --> 00:03:05,670 |
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الأمامي للعدسات |
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40 |
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00:03:08,410 --> 00:03:10,990 |
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view a large distance across target through the |
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41 |
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00:03:10,990 --> 00:03:14,530 |
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lenses move lens vertically and observe motion of |
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42 |
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00:03:14,530 --> 00:03:17,830 |
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horizontal line move lens horizontally and observe |
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43 |
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00:03:17,830 --> 00:03:22,990 |
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motion of vertical line و للتركيز على target معين |
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44 |
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00:03:22,990 --> 00:03:29,210 |
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إنه عنده فحص المحور الأفقي أو العمودي إنه عنده فحص |
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45 |
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00:03:29,210 --> 00:03:32,890 |
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المحور ال vertically إنه حرك العدسة right و left و |
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46 |
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00:03:32,890 --> 00:03:39,050 |
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عنده فحص ال horizontal إنه حرك العدسة up و downFor |
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47 |
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00:03:39,050 --> 00:03:42,750 |
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a plus or minus lens, a linear motion is used to |
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48 |
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00:03:42,750 --> 00:03:46,310 |
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neutralize power. If observe against motion, we |
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49 |
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00:03:46,310 --> 00:03:50,110 |
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use plus lens. If observe with motion, we use |
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50 |
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00:03:50,110 --> 00:03:54,410 |
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minus lens. ففي العدسة ال minus lens بتكون الحركة |
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51 |
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00:03:54,410 --> 00:03:59,860 |
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with movementأما كما أخدنا في مادة الـ ophthalmic |
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52 |
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00:03:59,860 --> 00:04:03,660 |
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العدسات هي عبارة عن مجموعة من البرزمات ففي حالة ال |
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53 |
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00:04:03,660 --> 00:04:08,780 |
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minus lens بتكون بتعتبر العدسة apex to apex و عند |
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54 |
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00:04:08,780 --> 00:04:15,320 |
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تحريك العدسة بتكون target بيتحرك with movement أما |
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55 |
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00:04:15,320 --> 00:04:19,120 |
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في حالة ال plus lens بتكون الحركة against movement |
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56 |
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00:04:19,120 --> 00:04:21,160 |
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لأنها تعتبر base to base |
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57 |
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00:04:24,950 --> 00:04:30,010 |
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هيو أول حاجة بنرسم cross target وفي حالة ال minus |
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58 |
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00:04:30,010 --> 00:04:34,290 |
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lens بتكون الحركة with movement وفي حالة ال plus |
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59 |
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00:04:34,290 --> 00:04:39,010 |
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lens بتكون الحركة against example an unknown lens |
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60 |
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00:04:39,010 --> 00:04:41,830 |
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is neutralized in the horizontal meridian with |
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61 |
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00:04:41,830 --> 00:04:46,340 |
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plus 3 and the vertical meridian with plus 2عنا |
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62 |
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00:04:46,340 --> 00:04:50,260 |
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عدسة مجهورة القوة عدلنا .. عدلنا .. عدلنا المحور |
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63 |
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00:04:50,260 --> 00:04:54,520 |
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ال horizontal طلع plus 3 و ال vertical meridian |
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64 |
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00:04:54,520 --> 00:05:01,640 |
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plus 2 كتبنا .. رسلنا cross .. cross target بنخفض |
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65 |
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00:05:01,640 --> 00:05:04,520 |
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أول حاجة ال .. ال more plus ال plus تلت .. ال more |
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66 |
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00:05:04,520 --> 00:05:09,200 |
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plus plus 3 و بنطرح ال .. لصغير من الكبير plus 2 |
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67 |
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00:05:09,200 --> 00:05:12,440 |
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minus plus 3 plus 1 و بنخفض أكثر من 100 |
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68 |
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00:05:17,820 --> 00:05:21,120 |
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معاكم فاطمة عزام اللي بحنتكلم عن الطريقة التانية |
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69 |
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00:05:21,120 --> 00:05:24,740 |
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لقياس قوة العفسة وهي geneva clock geneva clock |
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70 |
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00:05:24,740 --> 00:05:29,740 |
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بيتكون من three pins it has two fixed pins and |
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71 |
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00:05:29,740 --> 00:05:33,640 |
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movable pin in center بتكون من ثلاث pins او ساج |
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72 |
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00:05:33,640 --> 00:05:37,580 |
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الاتنين اللي على الأطراف تبتين واللي بالنص متحبك |
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73 |
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00:05:37,580 --> 00:05:40,620 |
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when it blasts وإن كانت ثابت the central pin moves |
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74 |
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00:05:40,620 --> 00:05:49,460 |
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or protrudeout wall لما نضعها على عدسة او على تحدى |
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75 |
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00:05:49,460 --> 00:05:53,640 |
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اللى فى ال center راح يدخل لجوا the central pin |
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76 |
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00:05:53,640 --> 00:05:56,460 |
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indicate the side of the surface which provide the |
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77 |
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00:05:56,460 --> 00:06:00,600 |
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direct reading of refractive power هذا ال pin اللى |
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78 |
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00:06:00,600 --> 00:06:04,340 |
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فى ال center هو اللى بيحددنا ال refractive power |
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79 |
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00:06:04,340 --> 00:06:05,060 |
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للعدسة |
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80 |
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00:06:07,500 --> 00:06:11,720 |
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استخدامات الـ Sagital Depth بتستخدم لقياس سماكة |
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81 |
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00:06:11,720 --> 00:06:15,640 |
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العدسة وقوة العدسة وready secure feature قطر |
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82 |
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00:06:15,640 --> 00:06:20,180 |
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التحدث لما نجي نفحص العدسات للسفير hold the lens |
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83 |
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00:06:20,180 --> 00:06:23,740 |
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measure set that the central contact point on the |
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84 |
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00:06:23,740 --> 00:06:26,180 |
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lens clock is at the optical center and the lens |
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85 |
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00:06:26,180 --> 00:06:29,400 |
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clock is perpendicular to the lens بنضع العدسة |
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86 |
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00:06:29,400 --> 00:06:34,560 |
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بنضع ال Geneva clock في مركز العدسة وبيكون عمودي |
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87 |
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00:06:34,560 --> 00:06:39,610 |
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عليهاwhen we rotate the clock we will not see any |
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88 |
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00:06:39,610 --> 00:06:44,030 |
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change in value لما نحرك الجينيفا clock مارح نلاحظ |
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89 |
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00:06:44,030 --> 00:06:47,010 |
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اي تغير في المؤشر because the power is equal in |
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90 |
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00:06:47,010 --> 00:06:53,070 |
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all meridian أما في العدسات السيلندر نضع الجينيفا |
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91 |
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00:06:53,070 --> 00:06:58,440 |
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clock في مركز العدسةLens clock is rotated at the |
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92 |
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00:06:58,440 --> 00:07:01,320 |
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point with all three contact points against the |
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93 |
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00:07:01,320 --> 00:07:05,600 |
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lens نحرك جينيفا clock and we will see changing in |
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94 |
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00:07:05,600 --> 00:07:08,900 |
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value because the surface has two curves the value |
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95 |
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00:07:08,900 --> 00:07:13,240 |
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of these curves indicates when the clock shows its |
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96 |
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00:07:13,240 --> 00:07:17,900 |
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maximum and minimum value لما نحرك جينيفا على |
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97 |
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00:07:17,900 --> 00:07:26,160 |
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العدسة رح نبحث تغير في المؤشر عشانمش متساوي القوة |
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98 |
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00:07:26,160 --> 00:07:30,560 |
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البصري .. القوة في عدسات المحاول مش متساوية أعملها |
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99 |
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00:07:30,560 --> 00:07:36,200 |
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العدسة هذا نضعها |
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100 |
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00:07:36,200 --> 00:07:44,840 |
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في المركز نلفها |
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101 |
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00:07:58,370 --> 00:08:08,230 |
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نرسل ال cross target ال front service plus |
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102 |
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00:08:08,230 --> 00:08:09,850 |
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.. plus أربعة |
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103 |
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00:08:26,840 --> 00:08:54,620 |
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مافيش تغيير كلها ساعة أربعة بس ال back |
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104 |
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00:08:54,620 --> 00:09:09,450 |
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serviceتسعة أبقى عند خمسة وسبعين معي نص سبعة |
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105 |
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00:09:09,450 --> 00:09:18,230 |
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أبقى عند خمسة سبعة أبقى عند خمسة وسبعين نجمعهم |
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106 |
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00:09:18,230 --> 00:09:22,850 |
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فمنا |
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107 |
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00:09:22,850 --> 00:09:23,450 |
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ساعة بقى |
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108 |
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00:09:26,440 --> 00:09:31,960 |
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سنة و خمس سنة و خمس سنة و خمس سنة و خمس سنة و خمس |
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109 |
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00:09:31,960 --> 00:09:35,060 |
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سنة و خمس سنة و خمس سنة و خمس سنة و خمس سنة و خمس |
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110 |
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00:09:35,060 --> 00:09:45,100 |
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سنة و خمس |
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111 |
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00:09:45,100 --> 00:09:46,240 |
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سنة |
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112 |
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00:10:09,610 --> 00:10:17,370 |
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الان سوف نتكلم عن ثلاثة كينيكال ثالث كينيكال، اتو |
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113 |
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00:10:17,370 --> 00:10:22,970 |
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مجرمات الهوار لينزس بلينزميتر نوع اللينزميتر |
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114 |
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00:10:25,120 --> 00:10:28,940 |
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automatic, manual, ال manual أدق من ال automatic, |
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115 |
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00:10:29,480 --> 00:10:32,280 |
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طبعا ال manual إيه له نوعين ال dot و ال cross, |
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116 |
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00:10:33,120 --> 00:10:37,260 |
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other names of lensmeter, photometer and |
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117 |
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00:10:37,260 --> 00:10:38,440 |
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ferrometer |
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118 |
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00:10:41,750 --> 00:10:46,570 |
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uses of lensmeter استخدامات ال lensmeter نستخدمه |
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119 |
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00:10:46,570 --> 00:10:50,190 |
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في single vision lenses و ال bifocal lenses و ال |
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120 |
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00:10:50,190 --> 00:10:55,110 |
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trifocal lenses و ال progressive addition lenses |
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121 |
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00:10:55,110 --> 00:11:01,150 |
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to determine that sphere and cylinder power مارك |
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122 |
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00:11:01,150 --> 00:11:05,190 |
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ده optical center contact lenses power and power |
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123 |
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00:11:05,190 --> 00:11:12,160 |
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of a prismعنا component of a prism أول حاجة ال IBS |
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124 |
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00:11:12,160 --> 00:11:16,200 |
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ال IBS طبعا بختلف من شخص لآخر حسب refractive error |
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125 |
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00:11:16,200 --> 00:11:20,680 |
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عنا ال prism combination device طبعا هدا .. هدا |
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126 |
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00:11:20,680 --> 00:11:27,520 |
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بتعوض ال prismعنا ال lens spotting device هذه |
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127 |
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00:11:27,520 --> 00:11:32,840 |
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تستخدم لتعليم العدسة في ال marking ال lens holder |
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128 |
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00:11:32,840 --> 00:11:37,760 |
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بنستخدمها لتثبيت العدسة و ال axis wheel لتحديد ال |
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129 |
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00:11:37,760 --> 00:11:42,100 |
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axis و ال power wheel لتحديد القوة عنا هنا lens |
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130 |
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00:11:42,100 --> 00:11:50,540 |
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meterعنا ال IBS عنا ال access wheel طبعا ال access |
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131 |
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00:11:50,540 --> 00:11:53,400 |
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wheel بيكون فى ال uncut lenses بيكون ثابت أما فى |
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132 |
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00:11:53,400 --> 00:11:56,460 |
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النضارات بيكون مختلف حسب ال left و ال right عنا ال |
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133 |
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00:11:56,460 --> 00:12:00,340 |
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power wheel اللى هو بنحدد فيها power العدسة طبعا |
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134 |
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00:12:00,340 --> 00:12:04,940 |
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سواء sphere أو سيلندر عنا ال spotting devices اللى |
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135 |
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00:12:04,940 --> 00:12:09,160 |
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هى تستخدم فى ال marking اللى بتعلم العدسة يبقى ال |
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136 |
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00:12:09,160 --> 00:12:13,840 |
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goal ده؟اه و هذا تثبيت العدسة طبعا إيه ماتتحركتها |
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137 |
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00:12:13,840 --> 00:12:19,800 |
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حسب العدسة اللي خدتها؟عنا زى ما بنعرف طبعا ال .. |
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138 |
|
00:12:19,800 --> 00:12:23,580 |
|
الأشعة بتيجي من ال infinity بتكون parallel أول ما |
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|
139 |
|
00:12:23,580 --> 00:12:28,760 |
|
تصادف ال .. ال .. الأشعة سواء صادفت .. بتيجي من ال |
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140 |
|
00:12:28,760 --> 00:12:31,160 |
|
parallel من ال infinity بتكون parallel سواء صادفت |
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141 |
|
00:12:31,160 --> 00:12:34,420 |
|
minus أو ال plus lenses هتتجمع في ال focal point |
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|
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142 |
|
00:12:34,420 --> 00:12:37,340 |
|
عنا في ال plus lenses طبعا أجدت الأشعة من ال |
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143 |
|
00:12:37,340 --> 00:12:41,180 |
|
infinity parallel هتتجمع behind ال lenses في ال .. |
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|
|
144 |
|
00:12:41,180 --> 00:12:44,420 |
|
حيسرينها ال conversions هتتجمع في ال focal point |
|
|
|
145 |
|
00:12:44,420 --> 00:12:48,670 |
|
behind the lensesأما في ال .. في ال minus lenses |
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|
|
146 |
|
00:12:48,670 --> 00:12:53,490 |
|
هتيجي الأشياء على parallel هتصادف ال .. ال minus |
|
|
|
147 |
|
00:12:53,490 --> 00:12:57,930 |
|
lenses هي .. هيكون divergent array لكن في منطقة |
|
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|
148 |
|
00:12:57,930 --> 00:13:02,130 |
|
معينة أو فترة معينة لازم يصيرلها convergent في ال |
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|
|
149 |
|
00:13:02,130 --> 00:13:04,110 |
|
focal point front lenses |
|
|
|
150 |
|
00:13:08,200 --> 00:13:12,040 |
|
عنا هذا طبعا ال optical system of lens meter ال |
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|
151 |
|
00:13:12,040 --> 00:13:17,560 |
|
symbol عنا ال eye of the observer عنا ال eye beast |
|
|
|
152 |
|
00:13:17,560 --> 00:13:22,220 |
|
اللي طبعا بختلف من شخص لآخر و بتتم ضبطه عبر ال |
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|
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153 |
|
00:13:22,220 --> 00:13:26,260 |
|
graphical عنا ال objective lenses عنا الأشياء أكيد |
|
|
|
154 |
|
00:13:26,260 --> 00:13:32,580 |
|
parallel ال standard lenses و ال light source و ال |
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|
|
155 |
|
00:13:32,580 --> 00:13:35,950 |
|
targetوعندنا ال scale اللي هو باقتمد حسب قوة |
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|
|
156 |
|
00:13:35,950 --> 00:13:39,310 |
|
العدسة بيكون minus أو plus مثلا إذا كانت العدسة |
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|
157 |
|
00:13:39,310 --> 00:13:43,110 |
|
minus لو اتحركنا نحو ال plus هتصير الصورة more |
|
|
|
158 |
|
00:13:43,110 --> 00:13:45,970 |
|
faint لكن إذا اتحركنا نحو الباق ال minus هتصير |
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|
159 |
|
00:13:45,970 --> 00:13:50,350 |
|
more clear حتى نصل للأوضع الصورة ديين ال scale؟ |
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|
160 |
|
00:13:50,350 --> 00:13:57,190 |
|
طبعا هنا بنشوف من ال eye piece بنشوف parallel لإن |
|
|
|
161 |
|
00:13:57,190 --> 00:14:00,010 |
|
بيكون ال target موضوع على ال nodal point للعدسة |
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|
|
162 |
|
00:14:05,000 --> 00:14:08,940 |
|
problem of simple lensmeter، في عندنا مشاكل ل |
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|
|
163 |
|
00:14:08,940 --> 00:14:12,180 |
|
simple lensmeter، the first is that the instrument |
|
|
|
164 |
|
00:14:12,180 --> 00:14:16,920 |
|
would have to be too large to be practical، أول |
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|
|
165 |
|
00:14:16,920 --> 00:14:20,540 |
|
مشكلة أنه بيكون الجهاز كتير طويل، يعني مثلا لو كان |
|
|
|
166 |
|
00:14:20,540 --> 00:14:25,420 |
|
عندنا عدسة minus ربع .. يعني ربع، بتحتاج جهاز طوله |
|
|
|
167 |
|
00:14:25,420 --> 00:14:29,070 |
|
أربعة متر، طبعا هذا .. هذا إشي مش معقول يعنيThe |
|
|
|
168 |
|
00:14:29,070 --> 00:14:31,750 |
|
second is that the scale for measuring Venice's |
|
|
|
169 |
|
00:14:31,750 --> 00:14:36,270 |
|
power would be non-linear، يكون ال scale ترتيبه |
|
|
|
170 |
|
00:14:36,270 --> 00:14:40,090 |
|
غير منتظم، يعني فيه فروقات بين كل power و التانية |
|
|
|
171 |
|
00:14:41,670 --> 00:14:44,810 |
|
introducing another lenses into a simplified lens |
|
|
|
172 |
|
00:14:44,810 --> 00:14:49,270 |
|
meter طبعا انه بما انه مش معقول ان يكون جهاز الى |
|
|
|
173 |
|
00:14:49,270 --> 00:14:53,450 |
|
عدسة ربع يكونيلها جهاز طوله 4 متر فكان الحل انه |
|
|
|
174 |
|
00:14:53,450 --> 00:14:57,270 |
|
بوضع standard lenses ال standard lenses عملت |
|
|
|
175 |
|
00:14:57,270 --> 00:15:00,930 |
|
shorting of length of instrument قسرت الجهاز و |
|
|
|
176 |
|
00:15:00,930 --> 00:15:04,310 |
|
make the depth still linear عملت linear منتظم و |
|
|
|
177 |
|
00:15:04,310 --> 00:15:10,420 |
|
بوارط منتظمThe relationship of the target movement |
|
|
|
178 |
|
00:15:10,420 --> 00:15:14,320 |
|
to power of unknown lenses فى علاقة بين ال target |
|
|
|
179 |
|
00:15:14,320 --> 00:15:18,200 |
|
movement و ال power لل unknown lenses الغير معروفة |
|
|
|
180 |
|
00:15:18,200 --> 00:15:24,260 |
|
عبر العلاقة X متساوية F U في الف على F S تربية ال |
|
|
|
181 |
|
00:15:24,260 --> 00:15:28,660 |
|
X هى طبعا ال target movement و ال F U اللى هى ال |
|
|
|
182 |
|
00:15:28,660 --> 00:15:31,400 |
|
power of unknown lenses و ال F S اللى هى ال |
|
|
|
183 |
|
00:15:31,400 --> 00:15:35,660 |
|
standard lensesعنا example for a standard lenses |
|
|
|
184 |
|
00:15:35,660 --> 00:15:38,760 |
|
plus twenty diopter, calculate the target movement |
|
|
|
185 |
|
00:15:38,760 --> 00:15:44,040 |
|
range in millimeter to cover minus twenty to plus |
|
|
|
186 |
|
00:15:44,040 --> 00:15:52,820 |
|
twenty diopter عنا المعطيات وعنا |
|
|
|
187 |
|
00:15:52,820 --> 00:15:53,920 |
|
المجمول X |
|
|
|
188 |
|
00:16:03,570 --> 00:16:12,170 |
|
X هنبدأ أول حاجة بـ X كتساوية أهلا |
|
|
|
189 |
|
00:16:12,170 --> 00:16:13,770 |
|
أهلا أهلا أهلا أهلا أهلا أهلا أهلا أهلا أهلا أهلا |
|
|
|
190 |
|
00:16:13,770 --> 00:16:15,110 |
|
أهلا أهلا أهلا أهلا أهلا أهلا أهلا أهلا أهلا أهلا |
|
|
|
191 |
|
00:16:15,110 --> 00:16:15,410 |
|
أهلا أهلا أهلا أهلا أهلا أهلا أهلا أهلا أهلا أهلا |
|
|
|
192 |
|
00:16:15,410 --> 00:16:15,430 |
|
أهلا أهلا أهلا أهلا أهلا أهلا أهلا أهلا أهلا أهلا |
|
|
|
193 |
|
00:16:15,430 --> 00:16:15,470 |
|
أهلا أهلا أهلا أهلا أهلا أهلا أهلا أهلا أهلا أهلا |
|
|
|
194 |
|
00:16:15,470 --> 00:16:27,530 |
|
أهلا أهلا أهلا أهلا أهلا أهلا أهلا |
|
|
|
195 |
|
00:16:27,530 --> 00:16:35,240 |
|
أand then انا انا |
|
|
|
196 |
|
00:16:35,240 --> 00:16:43,460 |
|
plus twenty تقرير بتساوي |
|
|
|
197 |
|
00:16:43,460 --> 00:16:54,260 |
|
تبسين minus تبسين minus تبسين x بتساوي |
|
|
|
198 |
|
00:16:54,260 --> 00:16:58,140 |
|
ولا ال plus twenty دلتر |
|
|
|
199 |
|
00:17:00,890 --> 00:17:10,150 |
|
Plus two meter في ألف على plus two meters تقريبا |
|
|
|
200 |
|
00:17:10,150 --> 00:17:17,370 |
|
بساوية plus 52 millimeter اما ال X انها حاصل |
|
|
|
201 |
|
00:17:17,370 --> 00:17:23,450 |
|
مجموعة فهم ده جمع قدام و بطلع 100 millimeter |
|
|
|
202 |
|
00:17:40,040 --> 00:17:44,960 |
|
السلام عليكم ورحمة الله وبركاتهفي عندنا قاعدة مهمة |
|
|
|
203 |
|
00:17:44,960 --> 00:17:47,260 |
|
بتحكي ان الـ different unknown lenses power and |
|
|
|
204 |
|
00:17:47,260 --> 00:17:49,840 |
|
the distance between the unknown lenses and the |
|
|
|
205 |
|
00:17:49,840 --> 00:17:53,140 |
|
standard lens will change both the target image |
|
|
|
206 |
|
00:17:53,140 --> 00:17:57,800 |
|
size and location ان الاختلاف ال unknown lenses |
|
|
|
207 |
|
00:17:57,800 --> 00:18:01,800 |
|
power والاختلاف .. المسافة بين ال unknown lenses و |
|
|
|
208 |
|
00:18:01,800 --> 00:18:07,300 |
|
ال standard lens هيقدر تغيير ال target image سواء |
|
|
|
209 |
|
00:18:07,300 --> 00:18:12,180 |
|
بال size أو بال locationهو الـ Continuous Lapse |
|
|
|
210 |
|
00:18:12,180 --> 00:18:17,580 |
|
مرحبا أول ما بيشي أنا اسمي سرقة نفسان راح أتحدث عن |
|
|
|
211 |
|
00:18:17,580 --> 00:18:20,520 |
|
ال Knapp's law بس قبل هك .. قبل ما بدي أحكي عنه |
|
|
|
212 |
|
00:18:20,520 --> 00:18:25,560 |
|
حكت زميلتنا أفنان أنه أحنا حاطينا لبلاس 20 ال |
|
|
|
213 |
|
00:18:25,560 --> 00:18:29,240 |
|
standard lens يعني عشان أنه أحنا بنعمل ال .. ال .. |
|
|
|
214 |
|
00:18:29,240 --> 00:18:33,060 |
|
لللنزة ال traditional lensmeter أنه يعمل short و |
|
|
|
215 |
|
00:18:33,060 --> 00:18:37,440 |
|
يسير ال skill linearبس انه احنا سؤالنا اللي |
|
|
|
216 |
|
00:18:37,440 --> 00:18:40,520 |
|
ماسألناهاش انه ليش انه ال target صح انه حاطينا |
|
|
|
217 |
|
00:18:40,520 --> 00:18:43,360 |
|
احنا high plus power بس انه ال target ماكبرش وضبط |
|
|
|
218 |
|
00:18:43,360 --> 00:18:46,660 |
|
نفس ال .. يعني نفس ال size مع أنها انها كبيرة يعني |
|
|
|
219 |
|
00:18:46,660 --> 00:18:50,780 |
|
plus 20 لما plus 25 ده يبتر فتفسيرها ده نوكنابس |
|
|
|
220 |
|
00:18:50,780 --> 00:18:54,400 |
|
لاو نوكنابس لاو بيحكيله ان ال image ال image size |
|
|
|
221 |
|
00:18:54,400 --> 00:18:58,480 |
|
target does not change if the posterior nodal |
|
|
|
222 |
|
00:18:58,480 --> 00:19:01,460 |
|
point of the second lens coincide with the |
|
|
|
223 |
|
00:19:01,460 --> 00:19:03,900 |
|
anterior focal point لل original lens |
|
|
|
224 |
|
00:19:08,510 --> 00:19:14,790 |
|
النرسمالية مثلا هي ال Imon هي فوق ال anterior |
|
|
|
225 |
|
00:19:14,790 --> 00:19:20,470 |
|
focal point وهي ال posterior focal point فهنا هم |
|
|
|
226 |
|
00:19:20,470 --> 00:19:25,310 |
|
حطوا ال standard lens اللي هي plus 20 أو plus 25 |
|
|
|
227 |
|
00:19:25,310 --> 00:19:30,050 |
|
ديبتر فإذا ما حطوا هاي و سروا و قلوها ان ال |
|
|
|
228 |
|
00:19:30,050 --> 00:19:33,210 |
|
posterior nodal point لإلها coincide يعني تتطبق مع |
|
|
|
229 |
|
00:19:33,210 --> 00:19:37,960 |
|
ال anterior focal point لهاالـ arterial focal |
|
|
|
230 |
|
00:19:37,960 --> 00:19:41,940 |
|
point للـ unknown lens فعمل short لل .. short لل |
|
|
|
231 |
|
00:19:41,940 --> 00:19:46,060 |
|
lensmeter وعمل ال scale linear هذا المبدأ هو عمل |
|
|
|
232 |
|
00:19:46,060 --> 00:19:49,860 |
|
ال lensmeter بس انه when applied to a lensmeter |
|
|
|
233 |
|
00:19:49,860 --> 00:19:53,600 |
|
when applied to a lensmeter Knapp's law called بدل |
|
|
|
234 |
|
00:19:53,600 --> 00:19:57,000 |
|
ال principle لإن احنا يعني لما نحكي على مبدأ ال |
|
|
|
235 |
|
00:19:57,000 --> 00:20:00,560 |
|
lensmeter ما بنستخدم انه Knapp's law بس نحكي بدل |
|
|
|
236 |
|
00:20:00,560 --> 00:20:04,220 |
|
ال principle أستراليومان كان ال telescope هذا ال |
|
|
|
237 |
|
00:20:04,220 --> 00:20:08,360 |
|
telescope الفضائيبالنسبة لـ ANE OBJECTIVE و IB |
|
|
|
238 |
|
00:20:08,360 --> 00:20:12,620 |
|
7010 OBJECTIVE و IB SEVERA و Plus Lenses بيعطونا |
|
|
|
239 |
|
00:20:12,620 --> 00:20:17,640 |
|
Magnified Virtual Image انه يتحسن لكي يكون مركزي |
|
|
|
240 |
|
00:20:17,640 --> 00:20:23,460 |
|
على الانفينيتي و لذلك فقط برهر الليت سيكون مراهق |
|
|
|
241 |
|
00:20:23,460 --> 00:20:27,460 |
|
في الركز انه احنا بنعمله adjust بنخليه انه .. |
|
|
|
242 |
|
00:20:27,460 --> 00:20:30,660 |
|
بنعمله adjust على الانفينيتي عشان يعطينا برهر ال |
|
|
|
243 |
|
00:20:30,660 --> 00:20:32,640 |
|
light region ال center اللي احنا نشوفه |
|
|
|
244 |
|
00:20:35,430 --> 00:20:40,210 |
|
هلأ steps to neutralize steptalic lens in manual |
|
|
|
245 |
|
00:20:40,210 --> 00:20:44,670 |
|
lensmeter اللي هو هذا طبعا اول طريقة ان احنا لازم |
|
|
|
246 |
|
00:20:44,670 --> 00:20:48,790 |
|
نعمل ال IBS should be focused manually اول اشهر ان |
|
|
|
247 |
|
00:20:48,790 --> 00:20:52,410 |
|
احنا بنعمل ال IBS اللي هي high بنحطها لاخر اشهر |
|
|
|
248 |
|
00:20:52,410 --> 00:20:56,800 |
|
يسار اكتر اشهر و لما يوضحينا بنسير الحركةطبعا ليش |
|
|
|
249 |
|
00:20:56,800 --> 00:21:00,580 |
|
ال IBS او ال issue انه بتعملنا ال approximate .. |
|
|
|
250 |
|
00:21:00,580 --> 00:21:03,800 |
|
approximate او ال amplitude لل accommodation تاني |
|
|
|
251 |
|
00:21:03,800 --> 00:21:07,700 |
|
issue refractive error لانه تاني issue ال power |
|
|
|
252 |
|
00:21:07,700 --> 00:21:12,240 |
|
weight should be level .. should be level 0 لازم |
|
|
|
253 |
|
00:21:12,240 --> 00:21:14,780 |
|
نحط ال power weight .. ال power weight على 0 و ال |
|
|
|
254 |
|
00:21:14,780 --> 00:21:18,800 |
|
axis weight على 0 كمان plus the spectral length of |
|
|
|
255 |
|
00:21:18,800 --> 00:21:22,360 |
|
the device toward the I .. IBS |
|
|
|
256 |
|
00:21:38,070 --> 00:21:41,690 |
|
هلأ المصدر انه زي ما احنا لابسينه هنحط هيه يعني |
|
|
|
257 |
|
00:21:41,690 --> 00:21:44,710 |
|
احنا لابسينها هيك هنحطها هيك |
|
|
|
258 |
|
00:21:59,180 --> 00:22:02,480 |
|
هك يعني انه هيكون ال front surface ليلها باتجاه ال |
|
|
|
259 |
|
00:22:02,480 --> 00:22:07,440 |
|
IBS و هنعمل لها measurement هاد الصورة مش واضحه |
|
|
|
260 |
|
00:22:07,440 --> 00:22:11,920 |
|
كتير بس انه قبل ما تعمل ال IBS هتكون ال blood ال |
|
|
|
261 |
|
00:22:11,920 --> 00:22:15,300 |
|
protector المنطقة في جوا ال lensmeter فيانا |
|
|
|
262 |
|
00:22:15,300 --> 00:22:18,340 |
|
protector لازم .. هتكون شوية مخفشة بس لما نعملها |
|
|
|
263 |
|
00:22:18,340 --> 00:22:22,380 |
|
هيصير focus هلا |
|
|
|
264 |
|
00:22:22,380 --> 00:22:24,760 |
|
ال target ال target اللي راح نشوفه جوا ال |
|
|
|
265 |
|
00:22:24,760 --> 00:22:29,240 |
|
lensmeterto measure the sphere lens هلأ هنبدأ |
|
|
|
266 |
|
00:22:29,240 --> 00:22:32,380 |
|
بالاسفير طبعا الاسفير مالهاش access لإنها has the |
|
|
|
267 |
|
00:22:32,380 --> 00:22:35,640 |
|
same power in all meridian move the lens such that |
|
|
|
268 |
|
00:22:35,640 --> 00:22:40,280 |
|
the target is exactly at the center rotate the |
|
|
|
269 |
|
00:22:40,280 --> 00:22:44,200 |
|
power wheel until target is clear and sharp stop |
|
|
|
270 |
|
00:22:44,200 --> 00:22:48,140 |
|
rotating power wheel when target is sharp إنه إذا |
|
|
|
271 |
|
00:22:48,140 --> 00:22:55,090 |
|
إحنامثلا يعني lens هذه sphere بس يعني انها تبقى |
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|
272 |
|
00:22:55,090 --> 00:23:00,630 |
|
سلندر بس هنكترها sphere انه اول اش هنحط ال lens |
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|
|
273 |
|
00:23:00,630 --> 00:23:04,850 |
|
بعدين طبعا احنا عاملين انه ال I-base هنخليه نوعي |
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|
274 |
|
00:23:04,850 --> 00:23:08,750 |
|
ات لما نشوف قبل ما نحط العدسة و ال power wheel و |
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|
275 |
|
00:23:08,750 --> 00:23:11,410 |
|
ال power wheel ع ال zero و ال axis wheel ع ال zero |
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|
|
276 |
|
00:23:11,410 --> 00:23:14,570 |
|
بس بعدين بنحطها و بنسير الحركة بال power wheel |
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|
|
277 |
|
00:23:14,570 --> 00:23:19,530 |
|
بيبقى انها sphere مش هنحتاج ال axis لما يظهر هناو |
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|
|
278 |
|
00:23:19,530 --> 00:23:23,730 |
|
طبعا فى عندنا dot و cross ال dot هيك هيكون شكله فى |
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|
|
279 |
|
00:23:23,730 --> 00:23:27,810 |
|
الاسفل انه عبارة عن دائرة نقاط اما ال cross اللى |
|
|
|
280 |
|
00:23:27,810 --> 00:23:30,750 |
|
فى عندنا خطان خطا و خط قصير و الاثنان هيكون واضحين |
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|
|
281 |
|
00:23:30,750 --> 00:23:36,490 |
|
فى الاسفل بينما to measure a cylindrical lens move |
|
|
|
282 |
|
00:23:36,490 --> 00:23:40,370 |
|
the lens such that the target is exactly at the |
|
|
|
283 |
|
00:23:40,370 --> 00:23:43,170 |
|
center rotate the power wheel and the axis wheel |
|
|
|
284 |
|
00:23:43,170 --> 00:23:48,550 |
|
until the target is clear and sharpthen rotate the |
|
|
|
285 |
|
00:23:48,550 --> 00:23:52,230 |
|
power wheel to get the center medium that align |
|
|
|
286 |
|
00:23:52,230 --> 00:23:55,390 |
|
the maximum and minimum طبعا ال cylinder فيها |
|
|
|
287 |
|
00:23:55,390 --> 00:24:00,090 |
|
cylindrical lenses فيها عندنا axis فأول ما نعمل ال |
|
|
|
288 |
|
00:24:00,090 --> 00:24:03,210 |
|
power wheel هنعمل برضه ال axis و لما نقول أول شي |
|
|
|
289 |
|
00:24:03,210 --> 00:24:07,510 |
|
sharp vision او sharp view او sharp image راح |
|
|
|
290 |
|
00:24:07,510 --> 00:24:11,070 |
|
نسجلها بعدين مش هنحرك ال axis هنحرك ال power بس |
|
|
|
291 |
|
00:24:11,070 --> 00:24:15,770 |
|
لما نلاقي يعني التنتين maximum و minimum powerفي |
|
|
|
292 |
|
00:24:15,770 --> 00:24:19,310 |
|
ال dot هيك فيه أن ال target بيكون تقريبا زي ثمانه |
|
|
|
293 |
|
00:24:19,310 --> 00:24:26,130 |
|
ولكن في ال cross في ال cross زي high بس لو واحد |
|
|
|
294 |
|
00:24:26,130 --> 00:24:34,430 |
|
هيكون بمق والتاني هنفتح أو العكس يعني example the |
|
|
|
295 |
|
00:24:34,430 --> 00:24:38,790 |
|
lensmeter power will extend into the high plus the |
|
|
|
296 |
|
00:24:38,790 --> 00:24:43,190 |
|
power will extendis then turned back slowly |
|
|
|
297 |
|
00:24:43,190 --> 00:24:47,610 |
|
reducing plus power until the sphere lines the |
|
|
|
298 |
|
00:24:47,610 --> 00:24:53,530 |
|
power and we will now read plus 2 يعني أنا بالسفير |
|
|
|
299 |
|
00:24:53,530 --> 00:25:01,770 |
|
هي أنا بالسفير و على read 12 أما ال power يعني |
|
|
|
300 |
|
00:25:01,770 --> 00:25:08,230 |
|
نرسمها هي |
|
|
|
301 |
|
00:25:08,230 --> 00:25:15,140 |
|
أنا plus 2الأساس 12 وعندنا كمان حركة دجال تاني |
|
|
|
302 |
|
00:25:15,140 --> 00:25:16,580 |
|
حركة تاني حركة تاني حركة تاني حركة تاني حركة تاني |
|
|
|
303 |
|
00:25:16,580 --> 00:25:16,780 |
|
حركة تاني حركة تاني حركة تاني حركة تاني حركة تاني |
|
|
|
304 |
|
00:25:16,780 --> 00:25:18,440 |
|
حركة تاني حركة تاني حركة تاني حركة تاني حركة تاني |
|
|
|
305 |
|
00:25:18,440 --> 00:25:18,500 |
|
حركة تاني حركة تاني حركة تاني حركة تاني حركة تاني |
|
|
|
306 |
|
00:25:18,500 --> 00:25:19,100 |
|
حركة تاني حركة تاني حركة تاني حركة تاني حركة تاني |
|
|
|
307 |
|
00:25:19,100 --> 00:25:28,580 |
|
حركة تاني حركة تاني حركة |
|
|
|
308 |
|
00:25:28,580 --> 00:25:34,680 |
|
تاني حركة |
|
|
|
309 |
|
00:26:00,830 --> 00:26:05,410 |
|
بداية السلام عليكم العافية على مقادرة ضيبة بس انا |
|
|
|
310 |
|
00:26:05,410 --> 00:26:11,450 |
|
في كان عندى يعني اتضافة بسيطة انهبعد ما انتهيتوا |
|
|
|
311 |
|
00:26:11,450 --> 00:26:15,050 |
|
من عرض ال presentation لو عملتوا هيك |
|
|
|
312 |
|
00:26:15,050 --> 00:26:18,650 |
|
classification من داحية ال advantages و ال |
|
|
|
313 |
|
00:26:18,650 --> 00:26:22,890 |
|
disadvantages لل three methods ال neutralization |
|
|
|
314 |
|
00:26:22,890 --> 00:26:28,390 |
|
تمام و الجريمة club و بالاضافة لل lens meter من |
|
|
|
315 |
|
00:26:28,390 --> 00:26:32,410 |
|
حيث مين الأقوى مين الأضعف مين مثلا اللي ممكن انا |
|
|
|
316 |
|
00:26:32,410 --> 00:26:37,930 |
|
احصل عليه by manually مين ممكن احصل عليه by |
|
|
|
317 |
|
00:26:37,930 --> 00:26:42,570 |
|
automatic تماممين ال accurate result؟ مين ال |
|
|
|
318 |
|
00:26:42,570 --> 00:26:47,430 |
|
inaccurate result؟ في الأخرين، تمام الشغل التاني |
|
|
|
319 |
|
00:26:47,430 --> 00:26:56,670 |
|
أنه أعتقد أثنان يعني ما حسبتي اللي هو في البدل أو |
|
|
|
320 |
|
00:26:56,670 --> 00:27:00,490 |
|
ال إقناع اللي هو؟ |
|
|
|
321 |
|
00:27:00,490 --> 00:27:05,310 |
|
ماعرف، مين فيكم كان ال إقناع اللي هو؟ أو البدل ال |
|
|
|
322 |
|
00:27:05,310 --> 00:27:10,380 |
|
principle؟ طيب، الآن الفكرة مرة تانيةال standard |
|
|
|
323 |
|
00:27:10,380 --> 00:27:15,680 |
|
lens ال anterior ولا ال posterior focal point هو |
|
|
|
324 |
|
00:27:15,680 --> 00:27:22,640 |
|
اللى بيكون concise لل spectacle lens او لل uncut |
|
|
|
325 |
|
00:27:22,640 --> 00:27:27,580 |
|
lens بستيريو بستيريو اعتقد هي سقطت معاك في الكلام |
|
|
|
326 |
|
00:27:27,580 --> 00:27:33,570 |
|
ان ال posterior ال posterior nodal pointمش هيقلتهم |
|
|
|
327 |
|
00:27:33,570 --> 00:27:36,590 |
|
صغير انهم يبقون coincide مع الأدنى from point to |
|
|
|
328 |
|
00:27:36,590 --> 00:27:42,990 |
|
point الخاصة فيه اللي هو ال spectacle length تمام، |
|
|
|
329 |
|
00:27:42,990 --> 00:27:48,230 |
|
في اي سؤال يا جماعة؟ يعطيكم العافية مرة تانية |
|
|
|
330 |
|
00:27:48,230 --> 00:27:51,970 |
|
موظفي ان شاء الله طبعا بنشكر الطالبات على هذه |
|
|
|
331 |
|
00:27:51,970 --> 00:27:57,370 |
|
المحاضرة القيمة و ان شاء الله بنكمل يوم التنين في |
|
|
|
332 |
|
00:27:57,370 --> 00:28:01,190 |
|
محاضرة او محاضرتين ان شاء الله يعطيكم العافية |
|
|
|
|