# US 8,770,744 B2 · Laminated composite lens

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- Number: US 8,770,744 B2
- Document ID: US8770744B2
- Status: Granted
- Kind: B2
- Application number: 13/801,754
- Filed: 2013-03-13
- Published: 2013-08-01
- Granted: 2014-07-08
- Earliest claimed: 2010-03-18
- Assignees: Vicoh, LLC
- Applicants: Jerome A. Legerton
- Inventors: Jerome A. Legerton
- Web page: https://patentgrep.com/patent/US8770744B2

## CPC

- G02C 7/049: {Contact lenses having special fitting or structural features achieved by special materials or material structures}
- B29D 11/00048: {composed of parts with dissimilar composition (B29D11/00057 takes precedence)}
- B29D 11/00076: {enabling passage of fluids, e.g. oxygen, tears, between the area under the lens and the lens exterior}
- B29D 11/00105: {covering a large part of the cornea}
- G02C 7/04: Contact lenses for the eyes (disinfection or sterilisation of contact lenses A61L12/00)
- G02C 2202/16: Laminated or compound lenses
- G02C: SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES (trial frames for testing the eyes A61B3/04; goggles or eyeshields not having the same features as spectacles A61F9/00)
- B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00)

## Abstract

The present invention is directed to a composite lens, comprising an anterior rigid gas permeable layer, and an annulus of soft material bonded to a posterior surface of the anterior rigid gas permeable layer, wherein a central zone of the composite lens is rigid and without a soft layer, wherein a peripheral zone of the composite lens is generally rigid in its anterior aspect and soft in its posterior aspect.

## Claims

### Claim 1

A composite lens, comprising:
a central zone and a peripheral zone;
an anterior rigid layer; and
an annulus of soft material bonded to a single posterior surface of the anterior rigid layer;
wherein the central zone is rigid and without a posterior soft layer;
wherein a peripheral aspect of the central zone is rigid in its anterior aspect and soft in its posterior aspect; and
wherein the peripheral zone is soft and without an anterior rigid layer,
wherein a radial width of the soft annulus is 250 microns to 5 mm, such that an edge of the composite lens is formed solely by the soft material transitioning anterior-ward to and extending substantially peripheral to the anterior rigid layer.

### Claim 2 (depends on 1)

The composite lens of claim 1, wherein the central zone of the composite lens is 7 mm to 16 mm in diameter.

### Claim 3 (depends on 1)

The composite lens of claim 1, wherein the central zone of the composite lens is 9 mm to 13 mm in diameter.

### Claim 4 (depends on 1)

The composite lens of claim 1, wherein the annulus of soft material comprises a non-segmented annulus.

### Claim 5 (depends on 1)

The composite lens of claim 1, wherein the edge comprises at least 2.5 mm of the soft material extending beyond the most peripheral aspect of the peripheral aspect of the central zone.

### Claim 6 (depends on 1)

The composite lens of claim 1, wherein the annulus of soft material comprises a segmented annulus.

### Claim 7 (depends on 6)

The composite lens of claim 6, wherein the segmentation of the annulus serves as a relief for undesired expansion of the soft material on hydration, and prevents buckling or surface distortion due to expansion.

### Claim 8 (depends on 6)

The composite lens of claim 6, wherein a thickness of the soft annulus varies to accommodate ocular contour.

### Claim 9 (depends on 6)

The composite lens of claim 6, wherein the segmented annulus comprises a plurality of segments separated by spaces between segments.

### Claim 10 (depends on 9)

The composite lens of claim 9, wherein the spaces provide for exchange of fluids from a post lens tear reservoir, which forms under the anterior rigid gas permeable layer.

### Claim 11 (depends on 9)

The composite lens of claim 9, wherein the spaces relieve lens-eye surface attraction, thereby facilitating lens removal.

### Claim 12 (depends on 9)

The composite lens of claim 9, wherein each segment comprises a sector of a peripheral portion of the lens ranging from 15 degrees to 30 degrees.

### Claim 13 (depends on 9)

The composite lens of claim 9, wherein a width of each space is 10 microns to 1000 microns.

### Claim 14

A composite lens, comprising:
a central zone and a peripheral zone;
an anterior rigid layer; and
an annulus of soft material bonded to a posterior surface of the anterior rigid layer adapted to lift the anterior rigid layer above a cornea of a wearer of the composite lens;
wherein the central zone is rigid and without a posterior soft layer;
wherein a peripheral aspect of the central zone is rigid in its anterior aspect and soft in its posterior aspect; and
wherein the peripheral zone is soft and without an anterior rigid layer.

### Claim 15 (depends on 14)

The composite lens of claim 14, wherein a thickness of the annulus of soft material varies to accommodate ocular contour.

### Claim 16 (depends on 14)

The composite lens of claim 14, wherein a thickness of the annulus of soft material is 2 microns to 1000 microns.