Method for forming a peripheral edge on contact lenses

Details Method for forming a peripheral edge on contact lenses Method for forming a peripheral edge on contact lenses

1983-03-02

1986-01-07

Albritton, C.L.

Electric heating

Metal heating

By arc

219121LN, 219121LY, 351160R, B23K 2608, G02C 704

Patent

active

045635650

ABSTRACT:
A method of forming edges on contact lenses prepared from laser-machinable, organic polymers wherein the edge is formed by contacting the lens with a laser beam having a wavelength which is absorbed by the polymer. The radiated energy supplied to the polymer by the laser beam is such that the ratio of heat absorbed in vaporization of the polymer to heat absorbed by the polymer bulk is maximized.

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patent: 4307046 (1981-12-01), Neefe
patent: 4455893 (1984-06-01), Astero

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