FIELD: ophthalmology, in particular, multifocal lenses, as well as methods for their manufacture.
SUBSTANCE: the lens with a gradual increase of the focal power has an added power, near vision zone vertical prism having a power and a base and a vertical prism having a power and a base added in essence to whole lens, the base of the added vertical prism is oriented in the direction opposite the direction of the base of the near vision zone vertical prism, and the power of the added vertical prism makes up about 0.25 percent of the added power.
EFFECT: produced lenses with a successive addition, in which the addition of the prismatic power makes it possible to compensate for an adverse influence on the quality of the image on the side of the non-prescribed prismatic power.
12 cl, 6 dwg
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| LENSES WITH SUCCESSIVE ADDITION | 1999 |
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| METHOD OF DESIGNING GROUP OF BI-ASPHERICAL LENSES WITH GRADUAL INCREASE OF FOCAL POWER AND GROUP OF BI-ASPHERICAL LENSES WITH GRADUAL INCREASE OF FOCAL POWER | 2006 |
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RU2373557C2 |
