Method for the manufacture of contact lenses

Details Method for the manufacture of contact lenses Method for the manufacture of contact lenses

1991-01-23

1992-05-19

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Utilizing plasma, electric, electromagnetic, particulate, or...

51284R, 156626, 156643, 264 11, 264 25, 264 401, B29D 1100

Patent

active

051146282

ABSTRACT:
A method for the manufacture of contact lenses, especially individually fitted contact lenses, and a contact lens production system therefor is described, wherein the topography of the surface of the eye is measured three-dimensionally, the geometry of the rear face of the lens is determined so as to fit the topography measured, the optical effect of a lachrymal lens which is formed between the rear face of the lens and the surface of the eye is determined, the geometry of the front face of the lens is determined taking into account the optical effect of the lachrymal lens and the sight correction to be achieved, and the data so obtained for the lens geometry of the front and rear faces of the lens are stored and transferred to a control arrangement for the manufacture of the lens in a machine tool.

REFERENCES:
patent: 2253497 (1941-08-01), Kollmorgen
patent: 2264080 (1941-11-01), Hunter
patent: 2664025 (1953-12-01), Herman
patent: 4497144 (1985-02-01), Kobayashi et al.
patent: 4842782 (1989-06-01), Portney et al.
patent: 4912880 (1990-04-01), Haddock et al.
patent: 4980993 (1991-01-01), Vmezaki
patent: 4989316 (1991-02-01), Logan et al.
Kivajew, A. A.; Fotokeratometrie in der Anpassungspraxis Harter Kontaktlinsen aka Augenoptik-Berlin 100 (1983) 4, Sten. 108-109, dated May 12, 1990 (DE).

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