Method for determining optimum thickness of ophthalmic lens

Details Method for determining optimum thickness of ophthalmic lens Method for determining optimum thickness of ophthalmic lens

1983-06-06

1986-02-25

Smith, Jerry

Boots, shoes, and leggings

33174A, 51284R, 351178, G02C 702, G02C 1300

Patent

active

045731217

ABSTRACT:
A method for determining the optimum thickness of an ophthalmic lens comprises the steps of applying data indicative of the kind of a lens suitable for a spectacle wearer and the contents of a prescription as inputs to a computer, executing necessary computation by the computer according to a predetermined program on the basis of the various input data thereby drawing a map of an equi-thickness line group of the ophthalmic lens on the basis of the result of computation, and placing a spectacle frame at a predetermined position on the map of the equi-thickness line group to find out the outermost equi-thickness line within the extent of the frame.

REFERENCES:
patent: 3740857 (1973-06-01), Nerad
patent: 4299032 (1981-11-01), Young
Jalie, M. "The Thickness of Spectacle Lenses", The Optician, vol. 152, Nos. 3936 thru 3943, Sep. thru Oct. 1966,. 6 Part Series.

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