Method of controlling the convex curve of soft lenses

Details Method of controlling the convex curve of soft lenses Method of controlling the convex curve of soft lenses

1984-07-05

1985-11-19

Flint, Jr., J. Howard

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

425808, B29D 1100

Patent

active

045541159

ABSTRACT:
A method of controlling the peripheral flattening of the convex aspheric surface on soft contact lenses by providing a soft lens having a spherical convex surface and aspheric concave surface. The concave aspheric surface having a longer radius at the center and progressive shorter radii toward the edge. When this lens is in place on the eye, the convex spherical surface becomes an aspheric surface having a shorter radius at the center and progressively longer radii toward the edge.

REFERENCES:
patent: 3641717 (1972-02-01), Neefe
patent: 3778937 (1971-11-01), Neefe
patent: 4084890 (1978-04-01), Baron
"Some Remarks on the Correction of Astigmatic Eyes by Means of Soft Contact Lenses", Contacto, Nov. 1975, pp. 4-8, Heinz Baron.
Am. J. Optom. & Physiol. Optics, pp. 750-757, vol. 51, Oct.'74, "Clinical Evaluation . . . Residual Astigmatism", Ron Kerns.
"Fitting Information", p. 5, Allan Isen.

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