Apparatus for formation of an ophthalmic lens precursor and lens

Patent metadata

Field	Value
Publication number	US-9857607-B2
Application number	US-201715428942-A
Country	US
Kind code	B2
Filing date	Feb 9, 2017
Priority date	Aug 21, 2007
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

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 Lens Precursor defined by first and second opposing surfaces, comprising
a non-fluent first portion comprised of polymeric material cross-linked beyond a gel point, and defined by a first side having a concave optical quality surface and a second opposing side, wherein the first side defines the first surface of the Lens Precursor; and
a second portion comprising a Fluent Lens Reactive Media extending over at least a portion of the second side of the first potion, wherein an exposed surface of the Fluent Lens Reactive Media exists in a stable state with minimal surface tension and forms the second surface of the Lens Precursor having a convex shape and being of optical quality.

2. The Lens Precursor according to claim 1 , wherein the Lens Precursor is adapted to be converted to a contact lens suitable for use in humans when the exposed surface of the Fluent Lens Reactive Media is exposed to actinic radiation to thereby polymerize the Fluent Lens Reactive Media.

3. The Lens Precursor according to claim 1 , wherein the Fluent Lens Reactive Media exists in a stable state solely under the influence of gravity.

4. The Lens Precursor according to claim 1 , wherein the non-fluent first portion is formed by cast molding.

5. The Lens Precursor according to claim 1 , wherein the non-fluent first portion is comprised of the same material as the Fluent Lens Reactive Media.

6. The Lens Precursor according to claim 5 , wherein the first portion is comprised of Fluent Lens Reactive Media polymerized on a voxel-by-voxel basis using actinic radiation.

Assignees

• Johnson & Johnson Vision Care

Inventors

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

Classifications

• G02C2202/08

  Series of lenses, lens blanks · CPC title

• B29D11/00144

  wherein the lens material is not fully polymerized, e.g. by leaving an unpolymerized volume · CPC title

• B28B17/00

  Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping (moulds B28B7/00; after-treatment B28B11/00; feeding or discharging B28B13/00; arrangements for embedding elements in the material B28B23/00) · CPC title

• B29C35/0805

  using electromagnetic radiation · CPC title

• B29D11/00009

  Production of simple or compound lenses · CPC title