Methods for designing multifocal ophthalmic lenses

Details Methods for designing multifocal ophthalmic lenses Methods for designing multifocal ophthalmic lenses

G - Physics

02

C

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

Patent

CA 2503799

The invention provides methods for designing lenses useful for correcting presbyopia that permits variation of the speed of the power change from distance to near vision power or near to distance vision power. The rate of change may be symmetrical around the midpoint or faster or slower on either side of the midpoint.

L'invention concerne des procédés de conception de lentilles ophtalmiques multifocales qui permettent de corriger la presbytie. Ce procédé permet de modifier la vitesse du changement de l'acuité visuelle en vision éloignée en acuité visuelle en vision rapprochée ou vice versa. La vitesse du changement peut être symétrique autour du point médian ou plus rapide ou plus lente sur chaque côté du point médian.

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