Source: https://patents.google.com/patent/US8066696?oq=6%2C957%2C233
Timestamp: 2018-02-20 14:50:38
Document Index: 171487554

Matched Legal Cases: ['art 2', 'art 21', 'art 22', 'art 80', 'art 22', 'art 23', 'art 23', 'art 23', 'art 23', 'art 23', 'art 23', 'art 80', 'art 23', 'art 23', 'art 25', 'art 28']

US8066696B2 - Ophthalmic laser treatment apparatus - Google Patents
US8066696B2
US8066696B2 US12010826 US1082608A US8066696B2 US 8066696 B2 US8066696 B2 US 8066696B2 US 12010826 US12010826 US 12010826 US 1082608 A US1082608 A US 1082608A US 8066696 B2 US8066696 B2 US 8066696B2
US12010826
US20080188838A1 (en )
An ophthalmic laser treatment apparatus, which allows SLT to be performed by a laser source not having a Q-switch which emits a continuous wave laser beam, has a laser source capable of emitting a continuous wave visible laser beam to be absorbed into pigment cells of trabecular meshwork, an irradiation optical system for directing the laser beam to a patient's eye so as to irradiate the eye with the laser beam, a device for pulsing the laser beam by controlling a driving duration of the laser source or opening and closing durations of a shutter in the irradiation optical system, a device capable of setting an irradiation duration of the laser beam within a range of 0.1 msec to 5 msec in order to perform Selective Laser Trabeculoplasty, and a device capable of setting irradiation energy density of the laser beam within a range of 1 J/cm2 to 8.5 J/cm2.
An object of the invention is to overcome the problems described above and to provide an ophthalmic laser treatment apparatus which allows SLT to be performed with the use of a laser source not having a Q-switch which emits a continuous wave laser beam.
A detailed description of one preferred embodiment of an ophthalmic laser treatment apparatus embodied by the present invention is provided below with reference to the accompanying drawings. FIG. 1 is a schematic external view showing the laser treatment apparatus according to the preferred embodiment of the present invention. FIG. 2 is a schematic view showing an optical system and a control system of the laser treatment apparatus.
FIG. 3 is a schematic external view showing the setting part 2. A display part 21 displays the number of times the irradiation of the treatment beam is made, and a display part 22 displays the spot size of the treatment beam. The spot size can be set within the range of 50 μm to 1000 μm in increments of 10 μm by means of the knob 10, and the signal of the spot size set by the knob 10 is inputted to the control part 80. A display part 22 a displays a recommended range of the spot size. A display part 23 displays the irradiation duration of the treatment beam, and a switch 24 is used for setting the irradiation duration. A display part 23 a indicates that conversion of the time unit of the irradiation duration displayed on the display part 23 is made. On the display part 23 a a letter “m” indicating a prefix “milli-” is arranged to be displayed by lighting. When the letter “m” is lit, the time unit of the irradiation duration displayed on the display part 23 is millisecond, and when the letter “m” is not lit, the time unit of the irradiation duration displayed on the display part 23 a is second. The control part 80 makes switching of the display upon receipt of a signal from the switch 24. The irradiation duration which can be displayed on the display part 23 and the display part 23 a (which can be set by the switch 24) is within a range of 0.1 msec to 3 sec. A display part 25 displays irradiation energy (power) of the treatment beam, and a switch 26 is used for setting the irradiation energy. An aiming switch 27 is used for adjusting brightness of the aiming beam. A switch 28 a is used for setting an irradiation interval of the treatment beam successively emitted during the time when the foot switch 5 is depressed, and a display part 28 b displays the set irradiation interval. The irradiation interval can be set within a range of 0.1 sec to 1 sec in increments of 0.1 sec. A switch 29 is used for performing switching between a status in which the irradiation of the treatment beam is permitted and a status in which the irradiation of the treatment beam is not permitted.
Energy (power) density by which an SLT effect or a similar effect is achieved is calculated from the experiment results in the following manner. Letting the total energy (power) be indicated by E(J), the set irradiation energy be indicated by P(W) and the set irradiation duration be indicated by d(sec), an equation, E=P·d, is established. Letting an irradiation area based on the set spot size be indicated by S, the energy density D (J/cm2) is calculated as follows.
D=E/S=P·d/S
In the experiments, the spot size was set to be 300 μm in diameter, and the following expression is established.
S=706.5×10−6 (cm2)
D=5.66˜8.49 (J/cm2)
D=1.13˜1.70 (J/cm2)
6. The ophthalmic laser treatment apparatus according to claim 1, wherein the selecting switch comprises a switch arranged to set the irradiation duration.
US12010826 2007-01-30 2008-01-30 Ophthalmic laser treatment apparatus Active 2029-03-25 US8066696B2 (en)
JP2007020116A JP4970068B2 (en) 2007-01-30 2007-01-30 Ophthalmic laser treatment apparatus
JP2007-20116 2007-01-30
JP2007-020116 2007-01-30
US20080188838A1 true US20080188838A1 (en) 2008-08-07
US8066696B2 true US8066696B2 (en) 2011-11-29
ID=39676808
US12010826 Active 2029-03-25 US8066696B2 (en) 2007-01-30 2008-01-30 Ophthalmic laser treatment apparatus
US (1) US8066696B2 (en)
JP (1) JP4970068B2 (en)
US20100174273A1 (en) * 2009-01-07 2010-07-08 Nidek Co., Ltd. Ophthalmic laser treatment apparatus
EP2739229B1 (en) * 2011-08-02 2017-03-22 Topcon Medical Laser Systems, Inc. Optimization of laser therapy
JPS5914848A (en) 1982-07-15 1984-01-25 Tokyo Optical Light treating apparatus
JPH02271581A (en) 1989-04-12 1990-11-06 Olympus Optical Co Ltd Laser device
JPH11332902A (en) 1998-05-28 1999-12-07 Nidek Co Ltd Laser treatment device
US6346100B1 (en) * 1998-05-29 2002-02-12 Nidek Co., Ltd. Laser treatment apparatus and laser treatment information display device
WO2004027487A1 (en) * 2002-09-18 2004-04-01 Ellex Medical Pty Ltd Ophthalmic laser system
US8382743B2 (en) * 2009-01-07 2013-02-26 Nidek Co., Ltd. Ophthalmic laser treatment apparatus
US20080188838A1 (en) 2008-08-07 application
JP2008183247A (en) 2008-08-14 application
JP4970068B2 (en) 2012-07-04 grant
Barkana et al. 2000 Laser eye injuries
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HITOSHI ABE;REEL/FRAME:020797/0556