Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1997-07-22
1999-10-05
Sugarman, Scott J.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
351212, 351247, 33507, G02C 702, A61B 310, G01B 100
Patent
active
059632992
ABSTRACT:
A method and apparatus for accurately observing a toric contact lens rotation for determining the prescription of a contact lens on an astigmatic eye, by providing a lens line guide alignment plate having a gravity responsive pivotal indicator, angle indicia arranged about the indicator, and a guide edge spaced from the indicator, a contact lens having at least one indicator marking, a slit lamp or other device for projecting a slit light beam on the lens to bisect the lens, rotationally orienting the slit light beam into alignment with the contact lens indicator marking, angularly orienting the guide edge to be in alignment with the rotated slit light beam, and reading the angle of the pivotal indicator relative to the indicia to ultimately determine the toric lens prescription.
REFERENCES:
patent: 449681 (1891-04-01), Lasar
patent: 1415833 (1922-05-01), Ginsburg
patent: 1532878 (1925-04-01), Bugbee
patent: 1919791 (1933-07-01), Larkin
patent: 2464547 (1949-03-01), Allyn
patent: 4201226 (1980-05-01), Phillips
patent: 4268133 (1981-05-01), Fischer
patent: 4309085 (1982-01-01), Morrison
patent: 4322139 (1982-03-01), Wichterle
patent: 4358897 (1982-11-01), Hornbeck
patent: 4901443 (1990-02-01), Lakhman
patent: 4976533 (1990-12-01), Hahn
patent: 5038489 (1991-08-01), Muehlenbein
patent: 5062701 (1991-11-01), Drazba
patent: 5184405 (1993-02-01), Cress
patent: 5517259 (1996-05-01), Blum
patent: 5528321 (1996-06-01), Blum
patent: 5561482 (1996-10-01), Miyake
patent: 5686981 (1997-11-01), Anan et al.
Life-Link Slope Meter, Life-Link International of Jackson Hole, Wyoming, .COPYRGT. 1980.
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