Apparatus for formation of an ophthalmic lens precursor and lens

Patent metadata

Field	Value
Publication number	US-9610742-B2
Application number	US-201314062728-A
Country	US
Kind code	B2
Filing date	Oct 24, 2013
Priority date	Aug 21, 2007
Publication date	Apr 4, 2017
Grant date	Apr 4, 2017

Abstract

This invention discloses apparatus for generating an ophthalmic lens with at least a portion of one surface free-formed from a Reactive Mixture. In some embodiments, an ophthalmic lens is formed on a substrate with an arcuate optical quality surface via a source of actinic radiation controllable to cure a definable portion of a volume of Reactive Mixture.

First claim

The invention claimed is:

1. A method for forming a contact lens comprising:
creating a non-fluent first portion of the contact lens having a predetermined shape defined by a first concave, optical quality surface adapted to be placed against a patient's eye and an opposing second surface;
providing a layer of Fluent Lens Reactive Media adjacent to and substantially covering the second surface of the first portion;
causing the Fluent Lens Reactive Media to flow under the force of gravity so that surface tension on an exposed surface thereof is reduced to thereby form a second convex optical quality surface;
further processing said Fluent Lens Reactive Media to thereby fix said Fluent Lens Reactive Media and second optical quality surface;
wherein the shape of the contact lens is defined by the optical quality concave first surface and the fixed second convex optical quality surface.

2. The method according to claim 1 , wherein the creating step further comprises:
placing a male mold having a convex, optical quality surface in a vessel containing a volume of Fluent Lens Reactive Media;
curing a portion of the Fluent Len Reactive Media adjacent to the male mold by passing actinic radiation through the male mold;
removing the male mold and cured portion of the Fluent Lens Reactive Media from the vessel; and
positioning the male mold and cured portion of the Fluent Lens Reactive Media so that the opposing second surface of the first portion is facing upwardsMedia.

3. The method according to claim 1 , wherein the causing step further comprises subsequently placing Fluent Lens Reactive Media on a previously formed first portion.

4. The method according to claim 1 , wherein the first portion is made using stereolithography.

5. The method according to claim 1 , wherein the first portion is made by cast molding.

6. The method according to claim 1 , wherein the first portion is comprised of the same material as the Fluent Lens Reactive Media.

7. The method according to claim 1 , wherein the first portion is made using Free-form techniques.

Assignees

• Johnson & Johnson Vision Care

Inventors

• Widman Michael F
• Enns I John B
• Powell P Mark
• Sites Peter W

Classifications

• B29D11/0073 Primary

  Optical laminates · CPC title

• B29D11/00038

  Production of contact lenses · CPC title

• B29D11/00134 Primary

  Curing of the contact lens material · CPC title

• B29D11/00009

  Production of simple or compound lenses · CPC title

• G02C7/04

  Contact lenses for the eyes (disinfection or sterilisation of contact lenses A61L12/00) · CPC title