Method of designing a fluid-filled contact lens

Patent metadata

Field	Value
Publication number	US-11940674-B2
Application number	US-202017066506-A
Country	US
Kind code	B2
Filing date	Oct 9, 2020
Priority date	Oct 25, 2019
Publication date	Mar 26, 2024
Grant date	Mar 26, 2024

Abstract

A method of designing a fluid-filled contact lens (103) is described. The method involves generating a computational model that includes a fluid-filled lens (103) and the shape of a cornea causes deformation of an internal structure of the fluid-filled lens (103) to generate a deformed, fluid-filled lens (103) with altered optical properties. The method also includes modelling (5) the optical properties of the deformed, fluid-filled lens (103). The shape of the fluid-filled lens (103) is then adjusted (7) to reduce the effects of the deformation on the optical properties. This is referred to as an adjusted fluid-filled lens (103). A corresponding off-eye lens design is generated (110 based on the adjusted fluid-filled lens design.

First claim

The invention claimed is:

1. A computer-implemented method of designing a fluid-filled contact lens, wherein the fluid-filled contact lens includes a fluid filled reservoir, the method comprises:
(a) generating a computational model, wherein the computational model comprises a fluid-filled lens and an eye having a cornea, and wherein in the computational model, the fluid-filled lens is modelled on the cornea such that simulated forces of a shape of the cornea act on the fluid-filled lens, which cause deformation to a fluid filled reservoir provided between a first lens member and a second lens member of the fluid-filled lens, and hence alters the optical properties of the fluid-filled lens, thereby generating a deformed, fluid-filled lens;
(b) modelling the optical properties of the deformed, fluid-filled lens;
(c) within the computational model, removing the fluid-filled lens from the cornea and adjusting the shape of the fluid-filled lens off-eye to reduce the effects of the deformation on the optical properties, thereby providing an adjusted fluid-filled lens; and
(d) generating a corresponding off-eye lens design based on the adjusted fluid-filled lens;
(e) manufacturing a fluid-filled lens based on the off-eye lens design.

2. The method of claim 1 , wherein the step of adjusting the shape of the fluid-filled lens comprises comparing a measured value of an optical property of the fluid-filled lens to an expected value or range of values.

3. The method of claim 1 , wherein the adjusting is carried out iteratively.

4. The method of claim 1 , wherein the fluid-filled lens is removed from the cornea, adjusted off-eye to reduce the effects of the deformation on the optical properties, replaced on the cornea, and its optical properties are re-modelled.

5. The method of claim 4 , wherein the removal, adjusting off-eye, replacement and remodelling are repeated iteratively.

6. The method of claim 4 , further comprising modelling changes to the shape of the adjusted fluid-filled lens occurring when it is removed from the cornea.

7. The method of claim 6 , wherein the modelling the changes comprises modelling a change in the curvature of the lens when it is removed from the cornea.

Assignees

• Coopervision Int Ltd

Inventors

• Oag Robert
• Bruce Ian
• Frith Robin
• Lazon De La Jara Percy
• Marullo Rachel

Classifications

• G02C7/085 Primary

  Fluid-filled lenses, e.g. electro-wetting lenses · CPC title

• G02C7/028

  Special mathematical design techniques · CPC title

• G02C7/04 Primary

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

• G02C7/049

  Contact lenses having special fitting or structural features achieved by special materials or material structures · CPC title