Progressive cylinder ophthalmic lenses

Details Progressive cylinder ophthalmic lenses Progressive cylinder ophthalmic lenses

G - Physics

02

C

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

Patent

CA 2503802

The invention provides methods for designing lenses useful for correcting astigmatism in which there is a progressive cylinder power. The lens of the invention permits the cylinder power to act under low luminance situations to a different extent than in higher luminance situations eliminating the need for extra toric minus power that may interfere near vision at mid range luminances while assisting distance vision at low luminance conditions.

L'invention concerne des procédés de conception de lentilles utiles pour corriger l'astigmatisme dans lesquelles il existe une puissance cylindrique progressive. La lentille de l'invention permet à la puissance progressive d'agir dans des situations de faible luminance selon une étendue différente que dans des situations de forte luminance ce qui élimine le besoin de puissance minimale extra torique pouvant interférer en vision proche à des luminances moyennes tout en aidant la vision à distance dans des conditions de faible luminance.

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