Patent ID: 6834957
Filing Date: 2004-12-28
Classification: G02C

Abstract:
Progressive power spectacle lens, comprising a first region configured for viewing at long distances; a second region configured for viewing at short distances; a progressive zone disposed between the first region and the second region in which a power of the spectacle lens increases from a value at a distance reference point located in the first region to a value at a near reference point located in the second region along a line curving towards a person's nose; and a progressive length which is less than or equal to 12 mm; wherein a width of the first region in a horizontal meridian y=+7 mm in dependence on power and addition power is larger than the values given in the following Table:Sph =âˆ’6.0 dptâˆ’2.5 dpt0.5 dpt3.0 dpt5.0 dptAddition47 mm55 mm60 mm60 mm60 mmPower = 1.0Addition34 mm36 mm34 mm29 mm35 mmPower = 2.0Addition26 mm27 mm25 mm22 mm23 mmPower = 3.0.