Treatment process for rendering corneal contact lenses hydrophil

Details Treatment process for rendering corneal contact lenses hydrophil Treatment process for rendering corneal contact lenses hydrophil

1981-05-05

1983-10-11

Hoffman, James R.

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

427 40, 427 41, 427164, G02B 112, G02B 104

Patent

active

044092580

ABSTRACT:
A process for rendering contact lenses made of a polymer or mixture of polymers hydrophilic or increasing their hydrophilic nature comprising generating a beam of positive ions which are essentially of equal kinetic energy, bombarding in an essentially uniform manner the surface of each lens by means of this beam and thereafter hydrating each contact lens; the positive ion beam is obtained by subjecting a gas from the group consisting of nitrogen, oxygen or compounds of these to an electric field produced between a cathode and an anode and in causing part of the accelerated positive ions to pass through the cathode.

REFERENCES:
patent: 3944709 (1976-03-01), Levy
patent: 4072769 (1978-02-01), Lidel
patent: 4143949 (1979-03-01), Chen
patent: 4214014 (1980-07-01), Hofer et al.

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