Progressive addition lenses having regressive surfaces

Details Progressive addition lenses having regressive surfaces Progressive addition lenses having regressive surfaces

G - Physics

02

C

G02C 7/04 (2006.01) G02C 7/02 (2006.01) G02C 7/06 (2006.01)

Patent

CA 2297620

The invention provides progressive lenses with reduced unwanted astigmatism obtained by combining progressive addition and regressive surfaces. The unwanted astigmatisms of the progressive and regressive surfaces act to cancel each other. Thus, the lens has reduced unwanted astigmatism compared to prior art lenses of comparable dioptric add power.

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