FIELD: ophthalmology; multiple focal ophthalmologic lenses.
SUBSTANCE: lens can be used for reduction in undesired astigmatism comparing to known traditional progressive lenses. Progressive lens having gradual growth of optical lens has at least one surface combined of progressive surface and of regressive surface. Combined surface has maximal localized undesired astigmatism which is 0,125 diopter at least smaller than sum of absolute values of maximal localized astigmatism of any progressive and regressive surfaces. Lens can additionally have second progressive surface with gradual growth of focal power. Lens can additionally have second surface which has to be regressive surface. Lens can have normalized distortion of lens being less than 300 square mm.
EFFECT: reduction of undesired astigmatism.
16 cl, 9 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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| METHOD OF TREATING PRESBYOPIA | 2008 |
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| LENSES WITH GRADUAL INCREASE OF OPTICAL POWER, APPROPRIATE FOR CLIENT REQUIREMENTS | 2001 |
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| METHOD OF TREATING PRESBYOPIA | 2012 |
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| LENS WITH GRADUAL INCREASE OF FOCAL POWER, WITH ADDED PRISMATIC POWER FOR IMPROVING THE USER'S COMFORT | 2002 |
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RU2282225C2 |
