Concentric ring single vision lens designs

Details Concentric ring single vision lens designs Concentric ring single vision lens designs

1995-05-04

1997-11-04

Epps, Georgia Y.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351160H, 351176, 623 6, G02C 704, G02C 702, A61F 216

Patent

active

056845600

ABSTRACT:
Concentric ring, single vision lens designs are disclosed which improve the depth-of-focus of the lens relative to current spherical contact lenses or intraocular lenses by placing at least one additional peripheral optical radius on the front or back surface of the lens. A plurality of concentric annular rings are provided in the periphery of the optic zone of the lens. The arrangement of optic powers in the concentric annular rings includes a mixture of the basic spherical refractive power and other annular rings with less plus or greater minus spherical refractive power, arranged to mediate spherical aberrations and improve visual acuity. The concentric annular ring design corrects peripheral, aperture-dependent ocular aberrations in a discrete, zonal fashion.

REFERENCES:
patent: 4564484 (1986-01-01), Neefe
patent: 4580882 (1986-04-01), Nuchmann
patent: 4890912 (1990-01-01), Visser
patent: 5050981 (1991-09-01), Roffman
patent: 5152787 (1992-10-01), Hamblen
patent: 5181053 (1993-01-01), Brown
patent: 5217489 (1993-06-01), Van Noy et al.
patent: 5220359 (1993-06-01), Roffman
patent: 5225858 (1993-07-01), Portney

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