Ophthalmic lens having an astigmatic effect

Details Ophthalmic lens having an astigmatic effect Ophthalmic lens having an astigmatic effect

1997-03-20

1999-07-06

Epps, Georgia

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351176, G02C 706, G02C 702

Patent

active

059203722

ABSTRACT:
An ophthalmic lens in which one surface is provided with at least one region, in which the refracting power is practically constant except for aspherical corrections, and at least one transition region which is adjacent to the region having practically constant surface refracting power, and in which the surface refracting power increases or decreases continuously, and the other surface is provided with an astigmatic effect. The orientation of the surface having an astigmatic effect relative to the surface having continuous refracting power change is dependent on the position of the axis of the astigmatism of the eye. The surface having an astigmatic effect deviates from the toric shape and is independent of the orientation of the surface relative to the surface having continuous refracting power change which is a surface optimized for the axial position of 0.degree..

REFERENCES:
patent: 4310225 (1982-01-01), Davis
patent: 4892403 (1990-01-01), Merle
patent: 5083859 (1992-01-01), Jalie

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