Polymer buttons having holes therein and contact lenses manufact

Details Polymer buttons having holes therein and contact lenses manufact Polymer buttons having holes therein and contact lenses manufact

1990-01-10

1992-04-14

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

2191217, 21912171, 351160H, 351177, G02C 704, B23K 2600

Patent

active

051042134

ABSTRACT:
An apertured polymer button in which that portion of the button which is machined and polished to produce a contact lens contains holes having a diameter of 40 to 60 microns and allow the passage through the finished lens of fluids and/or holes having a diameter of 5 to 25 microns and allow the passage through the finished lens of gases such as oxygen and carbon dioxide but not fluids.

REFERENCES:
patent: 3833786 (1974-09-01), Brucker
patent: 4068933 (1978-01-01), Seiderman
patent: 4194814 (1980-03-01), Fischer et al.
patent: 4466705 (1984-08-01), Michelson
patent: 4709996 (1987-12-01), Michelson
patent: 4886350 (1989-12-01), Wichterle

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