Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – With antiglare or shading
Patent
1974-02-27
1976-02-10
Rubin, David H.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
With antiglare or shading
351160, 351177, G02C 704
Patent
active
039375668
ABSTRACT:
A process for prescribing and manufacturing contact lenses wherein a first concave curvature is developed on the interior face of the lens in the central optical zone. This concave curvature conforms to a portion of a sphere having a radius equal to the radius of a base curve determined to be suitable for the particular patient. A second concave curvature is developed on the interior face of the lens to provide a bearing zone in surrounding relationship relative to the optical zone. The second curvature conforms to an annulus of a sphere having a radius determined by the slope of the patient's eye at points of contact of the second curvature with the eye. The slope is determined by calculating the eccentricity of the ellipsoidal surface which most closely describes the shape of the patient's eye.
REFERENCES:
patent: 2809556 (1957-10-01), Hornstein
patent: 3227507 (1966-01-01), Feinbloom
Goldberg, Article in Optometric Weekly, Vol. 60, No. 7, Feb. 13, 1969, pp. 31-38.
Jessop, Article in Contacto, Vol. 5, No. 10, Oct. 1961, pp. 325, 326, 329, 330 & 332.
Jessop, Article in Contacto, Vol. 9, No. 1, March 1965, pp. 10-13.
Bier, Article in Journal of the American Optometric Assoc., Vol. 28, No. 7, Feb. 1967, pp. 394-396.
Reynolds, Article in Contacto, Vol. 3, No. 3, March 1959, pp. 53-59.
Isen, Article in Optometric Weekly, Vol. 50, No. 52, Dec. 31, 1959, pp. 2581 & 2582.
Hamilton, Article in Contacto, June 1965, pp. 33 & 34 cited.
Mandell, Article in Am. J. of Optometry & Archives, Dec. 1965, pp. 742-747.
Townsley, Article in Contacto, Dec. 1967, pp. 72-81.
Rubin David H.
Wesley-Jessen Inc.
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