Mold for and method of making contact and intraocular lenses

Details Mold for and method of making contact and intraocular lenses Mold for and method of making contact and intraocular lenses

1986-11-12

1988-06-07

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Reshaping or treatment of an optical preform

51284R, 249 53R, 249117, 249137, 425808, B29D 1100

Patent

active

047495308

ABSTRACT:
Molded contact and intraocular lens blanks are lathe cut into the finished lens without demolding and prior measurement of the blank by the use of a hemispherical based mold with at least one key way adapted for spindle bore feeding to a lathe equipped with a hemispherical locating ring and corresponding key. Among other things the mold and method disclosed provide a convenient way to generate prism or multiple curve segments as required for segmented bifocal lenses or the like.

REFERENCES:
patent: 4118898 (1978-10-01), Godot
patent: 4155962 (1979-05-01), Neefe
patent: 4202848 (1980-05-01), Neefe
patent: 4441795 (1984-04-01), Lobdell

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