GB1584881A – Ocular membrane and method for the preparation thereof
– Google Patents
GB1584881A – Ocular membrane and method for the preparation thereof
– Google Patents
Ocular membrane and method for the preparation thereof
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Publication number
GB1584881A
GB1584881A
GB15725/77A
GB1572577A
GB1584881A
GB 1584881 A
GB1584881 A
GB 1584881A
GB 15725/77 A
GB15725/77 A
GB 15725/77A
GB 1572577 A
GB1572577 A
GB 1572577A
GB 1584881 A
GB1584881 A
GB 1584881A
Authority
GB
United Kingdom
Prior art keywords
zone
extrapupillary
membrane
ocular
ocular membrane
Prior art date
1976-04-15
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB15725/77A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1976-04-15
Filing date
1977-04-15
Publication date
1981-02-18
1977-04-15
Application filed by Individual
filed
Critical
Individual
1981-02-18
Publication of GB1584881A
publication
Critical
patent/GB1584881A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
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Classifications
C—CHEMISTRY; METALLURGY
C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
C08K5/00—Use of organic ingredients
C08K5/04—Oxygen-containing compounds
C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
C08K5/092—Polycarboxylic acids
B—PERFORMING OPERATIONS; TRANSPORTING
B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
B29C33/00—Moulds or cores; Details thereof or accessories therefor
B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
B29C33/52—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles soluble or fusible
B—PERFORMING OPERATIONS; TRANSPORTING
B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
B29D11/00—Producing optical elements, e.g. lenses or prisms
B29D11/00009—Production of simple or compound lenses
B29D11/00038—Production of contact lenses
B29D11/00067—Hydrating contact lenses
C—CHEMISTRY; METALLURGY
C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
C08F283/12—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polysiloxanes
C—CHEMISTRY; METALLURGY
C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
C08G77/04—Polysiloxanes
C08G77/38—Polysiloxanes modified by chemical after-treatment
C—CHEMISTRY; METALLURGY
C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
C08K5/00—Use of organic ingredients
C08K5/04—Oxygen-containing compounds
C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
C—CHEMISTRY; METALLURGY
C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
C08K5/00—Use of organic ingredients
C08K5/04—Oxygen-containing compounds
C08K5/10—Esters; Ether-esters
C—CHEMISTRY; METALLURGY
C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
C08K5/00—Use of organic ingredients
C08K5/04—Oxygen-containing compounds
C08K5/10—Esters; Ether-esters
C08K5/101—Esters; Ether-esters of monocarboxylic acids
C08K5/103—Esters; Ether-esters of monocarboxylic acids with polyalcohols
B—PERFORMING OPERATIONS; TRANSPORTING
B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
B29K2995/0037—Other properties
B29K2995/0065—Permeability to gases
B—PERFORMING OPERATIONS; TRANSPORTING
B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
B29K2995/0037—Other properties
B29K2995/0093—Other properties hydrophobic
Description
PATENT SPECIFICATION
( 11) 1 584881 ( 21) Application No 15725/77 ( 22) Filed 15 April 1977 ( 19) ( 31) Convention Application No 677246 ( 32) Filed 15 April 1976 in k O ( 33) United States of America (US) C: ( 44) Complete Specification published 18 Feb 1981 < ( 51) INT CL 3 GO 2 C 7/04 ( 52) Index at acceptance G 2 J 56 C ( 54) OCULAR MEMBRANE AND METHOD FOR THE PREPARATION THEREOF ( 71) I, WILLIAM SETH COVINGTON, a citizen of the United States of America, of Litchfield County, West Cornwall, Connecticut 06796, United States of America, do hereby declare the invention, for which I pray that a patent may be granted to me, and the method by which it is to be performed, to be particularly described in and by the
following statement:-
This invention relates to an ocular membrane, more particularly to a disposable, ultrathin ocular membrane which can be worn for long periods of time without discomfort.
The present invention provides an ocular membrane made of a single homogeneous material and comprising a pupillary zone and an extrapupillary zone concentrically disposed about the pupillary zone, the said extrapupillary zone having an average thickness less than the thickness of the said pupillary zone, and the extrapupillary zone having sufficient elasticity to be deformed by the eyelid during the normal blinking process when the ocular membrane is disposed on the eye of the wearer to form folds in the extrapupillary zone of the ocular membrane.
Preferably the pupillary zone is relatively thicker and hence less elastic than the extrapupillary zone to the extent that the pupillary zone will not be deformed by an eyelid during the normal blinking process.
The ocular membrane according to the present invention may be formed from a composition as described and claimed in my co-pending Application No 48502/78 (Serial No 1584882) and/or may be formed by the method described and claimed in either of my co-pending Application Nos 48503/78 and 48729/78 (Serial Nos 1584883 and 1584884).
The invention will be further described, by way of example only, with reference to the accompanying drawings, in which:
Figure 1 is a top plan view of an ocular membrane in accordance with the present invention; Figures 2-4 are cross-sectional view of ocular membranes in accordance with the present invention; Figure 5 shows an ocular membrane in accordance with the present invention in position when operatively placed on the human eye; Figure Sa is an enlarged view of a portion of Figure 5; and 55 Figure 6 is an enlarged view of a portion of an ocular membrane of the present invention.
Referring to the drawings, Figures 1 and 2 are plan and cross-sectional views respectively of an ocular membrane of the present inven 60 tion made of a single homogeneous material, while Figures 3 and 4 are cross-sectional views of other ocular membranes of the present invention which are also each made of a single homogeneous material Of course, 65 the specific shape of the membrane itself will depend upon the specific ophthalmic prescription required.
Figures 1 and 2 show a planar membrane generally indicated at 10 having an anterior 70 surface 12 and a posterior surface 14 The pupillary zone of the membrane 16 is concentrically disposed with the extrapupillary zone 18 about the central axis 20 of the membrane The anterior surface meets 75 the posterior surface at the edge 22 of the membrane in a manner to be more fully described below.
Figure 3 shows a plus membrane generally indicated at 24 having an extrapupillary 80 section 26 with a pupillary section 28 of a converging miniscus type, having an anterior surface 30 of the pupillary zone with a shorter radius of curvature than the posterior surface of the pupillary zone 32 The edge of 85 the membrane 34 is formed in the same manner as that of the membrane shown in Figure 2 and Figure 4 to be described below.
Figures 4 and 5 show a minus power membrane generally' indicated at 36 posi 90 tioned on a human eye generally indicated at 38 partially beneath the eyelid 40 The pupillary zone 41 of the membrane 36 is a minus powered miniscus consisting of an anterior surface 42 having a larger radius of 95 curvature than the posterior pupillary surface 44.
The extrapupillary zone 46 of the membrane 36 terminates at an edge 48 which is formed by an annular curved surface on the 100 1,584,881 anterior surface of the membrane which intersects with the uniformly curved extrapupillary surface of the posterior surface.
The edges of the other ocular membranes also terminate in this manner which is most clearly shown in Figure 6, where the intersecting curved surface designated R 3 is formed on the anterior surface of the ocular membrane having a radius of curvature R 2, and R 3 intersects the uniformly curved extrapupillary posterior surface having a radius of curvature R 1.
The important aspect of an ocular membrane of the present invention insofar as its physical form is concerned is the fact that it is extremely thin Thus, the ocular membranes as shown would have an average extrapupillary thickness of less than 0 10 mm.
Because of this thinness and the resultant lightness and permeability of the material to oxygen and carbon dioxide, the membrane may simply be placed on the eye in the usual manner and may be retained there for a number of days, weeks and even months without adverse effects of the eye Additionally, the thickness of the membrane coupled with the elasticity of the composition makes the membrane extremely flexible so that it is deformable by pressure of the eye lid during the normal blinking cycle This deformation enhances circulation of the precorneal fluid further improving the metabolic compatibility of the membrane with the eye Of course, the period of time that a given ocular membrane can be worn will depend to a great extent on the wearer and the ophthalmic prescription involved However, it is clear that the ocular membrane of the present invention for any given wearer, can be worn for significantly greater periods than the conventional contact lenses presently known.
As seen near the periphery of the membrane 36, a wrinkle or local temporary deformation 50 is produced during the blinking cycle This wrinkle which can be compared to a wave effect on the extrapupillary surface.
The wrinkle literally produces a pumping action circulating corneal liquid from beyond the periphery of the membrane to and from under the membrane in order to enhance the metabolic compatibility of the membrane with the eye.
Additionally, because the extrapupillary zone of the membrane is so thin, deformation produced by the blinking process is restricted to the extrapupillary section and does not in any way produce deformations in the pupillary zone of the membrane which would result in visual distortions to the wearer of the membrane This is made possible because the relative thinness of the extrapupillary section produces a relatively greater flexibility in the extrapupillary section than in the pupillary section of the membrane.
Claims (4)
WHAT I CLAIM IS:-
1 An ocular membrane made of a single homogeneous material and comprising a pupillary zone and an extrapupillary zone concentrically disposed about the pupillary zone, the said extrapupillary zone having an average thickness less than the thickness of the said pupillary zone, and the extrapupillary zone having sufficient elasticity to be deformed by the eyelid during the normal blinking process when the ocular membrane is disposed on the eye of the wearer to form folds in the extrapupillary zone of the ocular membrane.
2 An ocular membrane as claimed in Claim 1, wherein the pupillary zone is relatively thicker and hence less elastic than the extrapupillary zone to the extent that the pupillary zone will not be deformed by a eyelid during the normal blinking process.
3 An ocular membrane as claimed in Claim 1 or 2, wherein the average thickness of the extrapupillary zone is less than 010 mm.
4 An ocular membrane as claimed in any of Claims 1 to 3, wherein the said extrapupillary zone has anterior and posterior surfaces of substantially equal radius of curvature.
An ocular membrane according to Claim 1, substantially as herein described with reference to, and as shown in, Figures 1 and 2, Figure 3 or Figure 4 of the accompanying drawings.
MARKS & CLERK Printed for Her Majesty's Stationery Office by Burgess & Son (Abingdon), Ltd -1981.
Published at The Patent Office, 25 Southampton Buildings, London, WC 2 A l AY, from which copies may be obtained.
GB15725/77A
1976-04-15
1977-04-15
Ocular membrane and method for the preparation thereof
Expired
GB1584881A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US05/677,246
US4169119A
(en)
1976-04-15
1976-04-15
Method of molding an ocular membrane
Publications (1)
Publication Number
Publication Date
GB1584881A
true
GB1584881A
(en)
1981-02-18
Family
ID=24717926
Family Applications (4)
Application Number
Title
Priority Date
Filing Date
GB48503/78A
Expired
GB1584883A
(en)
1976-04-15
1977-04-15
Method of forming an ocular membrane
GB48729/78A
Expired
GB1584884A
(en)
1976-04-15
1977-04-15
Method of forming an ocular membrane
GB48502/78A
Expired
GB1584882A
(en)
1976-04-15
1977-04-15
Composition for forming an ocular membrane
GB15725/77A
Expired
GB1584881A
(en)
1976-04-15
1977-04-15
Ocular membrane and method for the preparation thereof
Family Applications Before (3)
Application Number
Title
Priority Date
Filing Date
GB48503/78A
Expired
GB1584883A
(en)
1976-04-15
1977-04-15
Method of forming an ocular membrane
GB48729/78A
Expired
GB1584884A
(en)
1976-04-15
1977-04-15
Method of forming an ocular membrane
GB48502/78A
Expired
GB1584882A
(en)
1976-04-15
1977-04-15
Composition for forming an ocular membrane
Country Status (15)
Country
Link
US
(1)
US4169119A
(en)
JP
(2)
JPS5942850B2
(en)
AU
(1)
AU2421877A
(en)
BE
(1)
BE853658A
(en)
CA
(1)
CA1097958A
(en)
CH
(1)
CH621002A5
(en)
DE
(1)
DE2713444C2
(en)
FR
(2)
FR2348249A1
(en)
GB
(4)
GB1584883A
(en)
IL
(1)
IL51697A
(en)
IT
(1)
IT1086695B
(en)
NL
(1)
NL7704136A
(en)
NZ
(2)
NZ183696A
(en)
SE
(1)
SE7704080L
(en)
ZA
(1)
ZA771812B
(en)
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GB2239532A
(en)
*
1989-12-07
1991-07-03
Erich A Koeniger
Bifocal contact lens
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1976
1976-04-15
US
US05/677,246
patent/US4169119A/en
not_active
Expired - Lifetime
1977
1977-03-18
IL
IL51697A
patent/IL51697A/en
unknown
1977-03-24
NZ
NZ183696A
patent/NZ183696A/en
unknown
1977-03-24
NZ
NZ189240A
patent/NZ189240A/en
unknown
1977-03-25
ZA
ZA00771812A
patent/ZA771812B/en
unknown
1977-03-26
DE
DE2713444A
patent/DE2713444C2/en
not_active
Expired
1977-04-04
CA
CA275,488A
patent/CA1097958A/en
not_active
Expired
1977-04-06
IT
IT48852/77A
patent/IT1086695B/en
active
1977-04-06
SE
SE7704080A
patent/SE7704080L/en
unknown
1977-04-08
FR
FR7710744A
patent/FR2348249A1/en
active
Granted
1977-04-12
CH
CH448077A
patent/CH621002A5/fr
not_active
IP Right Cessation
1977-04-12
JP
JP52041027A
patent/JPS5942850B2/en
not_active
Expired
1977-04-13
AU
AU24218/77A
patent/AU2421877A/en
not_active
Expired
1977-04-15
GB
GB48503/78A
patent/GB1584883A/en
not_active
Expired
1977-04-15
GB
GB48729/78A
patent/GB1584884A/en
not_active
Expired
1977-04-15
BE
BE176768A
patent/BE853658A/en
not_active
IP Right Cessation
1977-04-15
GB
GB48502/78A
patent/GB1584882A/en
not_active
Expired
1977-04-15
NL
NL7704136A
patent/NL7704136A/en
not_active
Application Discontinuation
1977-04-15
GB
GB15725/77A
patent/GB1584881A/en
not_active
Expired
1977-11-23
FR
FR7735165A
patent/FR2375615A1/en
not_active
Withdrawn
1982
1982-02-05
JP
JP57017387A
patent/JPS606971B2/en
not_active
Expired
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2239532A
(en)
*
1989-12-07
1991-07-03
Erich A Koeniger
Bifocal contact lens
GB2239532B
(en)
*
1989-12-07
1993-08-25
Erich A Koeniger
Biofocal contact lens
Also Published As
Publication number
Publication date
BE853658A
(en)
1977-08-01
DE2713444A1
(en)
1977-11-03
JPS5942850B2
(en)
1984-10-18
IT1086695B
(en)
1985-05-28
CH621002A5
(en)
1980-12-31
SE7704080L
(en)
1977-10-16
FR2375615A1
(en)
1978-07-21
AU2421877A
(en)
1978-10-19
IL51697A
(en)
1980-12-31
US4169119A
(en)
1979-09-25
NZ183696A
(en)
1980-05-08
GB1584882A
(en)
1981-02-18
JPS606971B2
(en)
1985-02-21
ZA771812B
(en)
1978-04-26
DE2713444C2
(en)
1986-05-07
JPS57164153A
(en)
1982-10-08
NL7704136A
(en)
1977-10-18
GB1584883A
(en)
1981-02-18
NZ189240A
(en)
1980-05-08
FR2348249A1
(en)
1977-11-10
CA1097958A
(en)
1981-03-24
FR2348249B1
(en)
1980-09-19
JPS52145458A
(en)
1977-12-03
GB1584884A
(en)
1981-02-18
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Legal Events
Date
Code
Title
Description
1981-05-28
PS
Patent sealed [section 19, patents act 1949]
1984-12-19
PCNP
Patent ceased through non-payment of renewal fee
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