# US 2013/0141691 A1 · Progressive reading and intermediate distance lens defined by employment of a zernike expansion

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- Number: US 2013/0141691 A1
- Document ID: US20130141691A1
- Status: Published application
- Kind: A1
- Application number: 13/749,072
- Filed: 2013-01-24
- Published: 2013-06-06
- Earliest claimed: 2007-10-30
- Assignees: Visionware LLC
- Inventors: John D. Lytle
- Web page: https://patentgrep.com/patent/US20130141691A1

## CPC

- G02C 7/024: {Methods of designing ophthalmic lenses}
- G02C 7/028: {Special mathematical design techniques}
- G02C 7/061: {Spectacle lenses with progressively varying focal power}
- G02C 7/063: {Shape of the progressive surface}
- G02C 7/066: {Shape, location or size of the viewing zones}
- 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)

## Abstract

There is provided a lens that includes a corridor having a width greater than or equal to about 6 millimeters. The lens has astigmatism less than or equal to about 0.5 diopter within the corridor. There is also provided an item of eyewear that includes such a lens, and a method for representing a surface of an ophthalmic lens.

## Claims

### Claim 1

An item of eyewear, comprising:
a lens holder; and
a pair of progressive addition lenses situated in said lens holder to satisfy a span of interpupillary distances of at least 6 millimeters.

### Claim 2

A method comprising:
representing a surface for each of a pair of ophthalmic lenses by way of a Zernike expansion; and
situating said pair of lenses in a lens holder to satisfy a span of interpupillary distances of at least 6 millimeters.

### Claim 3 (depends on 2)

The method of claim 2, wherein said ophthalmic lenses are progressive addition lenses.

### Claim 4 (depends on 3)

The method of claim 3, wherein said ophthalmic lenses are aspheric lenses.

### Claim 5

A method comprising:
designing an ophthalmic lens,
wherein said designing employs, as design parameters,
(a) a predetermined boundary shape of said ophthalmic lens for ultimate use, and
(b) a predetermined boundary size of said ophthalmic lens for ultimate use.

### Claim 6 (depends on 5)

The method of claim 5, wherein said ophthalmic lens is a progressive addition lens.

### Claim 7 (depends on 5)

The method of claim 5, wherein said ophthalmic lens is an aspheric lens.

### Claim 8 (depends on 5)

The method of claim 5, wherein said designing comprises representing a surface of said ophthalmic lens by way of a Zernike expansion.

### Claim 9 (depends on 8)

The method of claim 8, wherein said Zernike expansion employs at least ten terms.

### Claim 10 (depends on 5)

The method of claim 5, wherein said designing employs, as a design parameter, a pupil size of a wearer for use of said ophthalmic lens.

### Claim 11 (depends on 5)

The method of claim 5, further comprising manufacturing said ophthalmic lens.

### Claim 12 (depends on 11)

The method of claim 11, further comprising situating said ophthalmic lens in a lens holder.

### Claim 13 (depends on 5)

The method of claim 5, wherein said ophthalmic lens is one of two such lenses that when situated in a lens holder satisfy a span of interpupillary distances of at least 6 millimeters.