Process of spincasting a compound contact lens

Details Process of spincasting a compound contact lens Process of spincasting a compound contact lens

1992-10-29

1994-04-05

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Rotational molding

B29D 1100

Patent

active

053002628

ABSTRACT:
The process of reproducibly making a wholly spuncasted, non-truncated, ballasted soft contact lens containing a compound anterior surface. The process comprises spincasting a polymer-forming, lens forming monomeric mixture in a cavity mold having a surface that is offset to allow for generation of a prismatic ballast, a compound curvature and a central axis that is symmetrical to the peripheral edge of the lens being formed. This is done by rotating the monomer mixture in the mold whereby the mixture replicates the mold's surface while at the same time undergoes polymerization and forms a prismatic lens with the central axis of its posterior surface symmetrical to its peripheral edge, a corneal bowl free of the compound curvature and possessing a thickness profile that is asymmetrical with respect to its geometric center.

REFERENCES:
patent: 3555126 (1971-01-01), Gitson
patent: 3660545 (1972-05-01), Wichterle
patent: 4324461 (1982-04-01), Salvatori

Affiliated with

Also associated with

Rating

Process of spincasting a compound contact lens does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process of spincasting a compound contact lens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process of spincasting a compound contact lens will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-509263