EP0484044A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Contact lens
Assignee: PBH Inc
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Filing: 1991-10-23
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Granted: —
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Expires: 2011-10-23
Abstract
Abstract A contact lens of generally disc-like configuration having a central axis extending through the contact lens and about which the contact lens is substantially symmetric in configuration. The contact lens has a pupil zone through which the central axis extends and which comprises the area immediately circumferentially surrounding the central axis; an iris zone, which comprises the area circumferentially surrounding the pupil zone; and a peripheral zone which comprises the area circumferentially surrounding the iris zone and extends to the edge of the contact lens; Further in the area immediately adjacent to the periphery of the iris zone and the contact lens and circumferentially extending therearound a band of dark substantially light-absorbing colour is provided.
Inventors
- 👤 John M. Evans
- 👤 Ashok Thakrar
- 👤 Edward Williams
- 👤 Praful Doshi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 17:43
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/02; G02C7/04; G02C7/046; B; B29; B29D; B29D11/00; B29D11/00009; B29D11/00038; B29D11/00048; B29D11/00057; B29D11/00317; B29K; B29K2995/00; B29K2995/0018; B29K2995/002
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
119 words
A contact lens of generally disc-like configuration which has a central axis extending through the contact lens and about which the contact lens is substantially symmetric in configuration, which contact lens has - a pupil zone through which the central axis extends and which comprises the area immediately circumferentially surrounding the central axis; - an iris zone, which comprises the area circumferentially surrounding the pupil zone; and - a peripheral zone which comprises the area circumferentially surrounding the iris zone and extends to the edge of the contact lens; wherein in the area immediately adjacent to the periphery of the iris zone and the contact lens and circumferentially extending therearound a band of dark substantially light-absorbing colour is provided.
Claim 2
Dependent Claim
26 words
A contact lens as claimed in claim 1, wherein the contact lens provided with the band of dark substantially light-absorbing colour is a soft contact lens.
Claim 3
Dependent Claim
26 words
A contact lens as claimed in claim 1, wherein the contact lens provided with the band of dark substantially light-absorbing colour is a composite contact lens.
Claim 4
Dependent Claim
26 words
A contact lens as claimed in any one of claims 1 to 3, wherein the band of substantially light-absorbing colour comprises a solid band of colour.
Claim 5
Dependent Claim
53 words
A contact lens as claimed in any one of claims 1 to 3, wherein the band of substantially light-absorbing colour comprises a series of thin bands of substantially light-absorbing colour which are closely spaced to one another in order to give the impression that they are one band of colour to the viewer.
Claim 6
Dependent Claim
44 words
A contact lens as claimed in any one of claims 1 to 3, wherein the band of substantially light-absorbing colour comprises a series of islands of colour which interact with one another to give the impression to the viewer that they are a band.
Claim 7
Dependent Claim
28 words
A contact lens as claimed in any one of the preceding claims, wherein the band of dark substantially light-absorbing colour is applied by tinting the finished contact lens.
Claim 8
Dependent Claim
44 words
A contact lens as claimed in any one of the preceding claims, wherein the dark, substantially light-absorbing colour comprises a pigment suspended in a solvent which is applied to the surface of a contact lens mould, with the contact lens cast and polymerised thereabouts.
Claim 9
Dependent Claim
38 words
A contact lens as claimed in claim 2, wherein the dark substantially light-absorbing colour comprises a precipitate vat dye which is applied to the surface of a contact lens mould, and the contact lens cast and polymerised thereabouts.
Claim 10
Dependent Claim
29 words
A contact lens as claimed in any one of the preceding claims, wherein the band of dark substantially light-absorbing colour is printed onto the surface of the contact lens.
Claim 11
Dependent Claim
40 words
A contact lens as claimed in claim 7, wherein the band of dark substantially light-absorbing colour applied to the surface of a contact lens comprises a band which is printed onto the external (or convex) surface of the contact lens.
Claim 12
Dependent Claim
54 words
A contact lens as claimed in claim 2, wherein the band of dark substantially light-absorbing colour is incorporated into the body of the lens by pigment being dispersed in a polymerisable medium which is then applied to the surface of a contact lens casting mould and the contact lens is cast and polymerised thereabouts.
Claim 13
Dependent Claim
56 words
A contact lens as claimed in claim 1, wherein the band of dark substantially light-absorbing colour is incorporated into the contact lens using a rod of polymeric material, which rod has a band of dark substantially light-absorbing colour throughout its length, and this rod is cut into buttons from which the contact lenses are then machined.
Claim 14
Dependent Claim
16 words
A contact lens as claimed in claim 3, wherein the rod formed is an individual button.
Claim 15
Dependent Claim
30 words
A contact lens as claimed in any one of the preceding claims, wherein a three layer sandwich button wherein a dark coloured central layer is sandwiched between two clear layers.
Claim 16
Dependent Claim
21 words
A contact lens as claimed in claim 15, wherein the central layer has a thickness of 0.05 mm to 1 mm.
Claim 17
Dependent Claim
31 words
A contact lens as claimed in any one of the preceding claims, wherein a three layer sandwich button is formed with a dark coloured central layer sandwiched between two clear layers.
Claim 18
Dependent Claim
40 words
A contact lens as claimed in any one of the preceding claims, wherein the band of dark substantially light-absorbing colour is provided at a radius of between 5.0 mm and 6.75 mm from the central axis of the contact lens.
Claim 19
Dependent Claim
31 words
A contact lens as claimed in any one of the preceding claims, wherein the band of dark substantially light-absorbing colour is provided with a width of 0.2 mm to 1.0 mm.
References Cited (Backward Citations)
No citation records indexed.
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