CA2019685C - Lentille composite et methode de fabrication - Google Patents

Lentille composite et methode de fabrication

Info

Publication number: CA2019685C
Authority: CA; Canada
Prior art keywords: lens; compound; mold; ballasted; contact lens
Prior art date: 1990-06-22
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 - Fee Related

Application number

CA 2019685

Other languages

English (en)

Other versions

CA2019685A1 (fr

Inventor

Robert E. Glick

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.)

Hydron Ltd

Original Assignee

Hydron Ltd

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.)

1990-06-22

Filing date

1990-06-22

Publication date

1999-09-07

1990-06-22 Application filed by Hydron Ltd filed Critical Hydron Ltd

1990-06-22 Priority to CA 2019685 priority Critical patent/CA2019685C/fr

1991-12-22 Publication of CA2019685A1 publication Critical patent/CA2019685A1/fr

1999-09-07 Application granted granted Critical

1999-09-07 Publication of CA2019685C publication Critical patent/CA2019685C/fr

2010-06-22 Anticipated expiration legal-status Critical

Status Expired - Fee Related legal-status Critical Current

Links

150000001875 compounds Chemical class 0.000 title claims abstract description 38
238000000034 method Methods 0.000 title claims description 19
238000004519 manufacturing process Methods 0.000 title abstract description 17
239000000203 mixture Substances 0.000 claims abstract description 27
239000000178 monomer Substances 0.000 claims abstract description 27
238000004528 spin coating Methods 0.000 claims abstract description 27
230000002093 peripheral effect Effects 0.000 claims description 12
229920000642 polymer Polymers 0.000 abstract description 5
238000006116 polymerization reaction Methods 0.000 description 21
238000002347 injection Methods 0.000 description 10
239000007924 injection Substances 0.000 description 10
238000005266 casting Methods 0.000 description 9
239000000463 material Substances 0.000 description 9
238000000465 moulding Methods 0.000 description 9
239000003054 catalyst Substances 0.000 description 8
-1 e.g. Chemical compound 0.000 description 7
PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 6
CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 6
201000009310 astigmatism Diseases 0.000 description 6
230000005855 radiation Effects 0.000 description 6
230000001256 tonic effect Effects 0.000 description 6
238000012937 correction Methods 0.000 description 5
CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 4
WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 description 4
238000006243 chemical reaction Methods 0.000 description 4
LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 4
239000003999 initiator Substances 0.000 description 4
230000003287 optical effect Effects 0.000 description 4
239000004033 plastic Substances 0.000 description 4
229920003023 plastic Polymers 0.000 description 4
239000004416 thermosoftening plastic Substances 0.000 description 4
230000000007 visual effect Effects 0.000 description 4
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 description 3
NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
125000000217 alkyl group Chemical group 0.000 description 3
MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
230000004438 eyesight Effects 0.000 description 3
125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 3
239000007788 liquid Substances 0.000 description 3
239000004800 polyvinyl chloride Substances 0.000 description 3
229920000915 polyvinyl chloride Polymers 0.000 description 3
239000002904 solvent Substances 0.000 description 3
229920001169 thermoplastic Polymers 0.000 description 3
OLQFXOWPTQTLDP-UHFFFAOYSA-N 2-(2-hydroxyethoxy)ethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCOCCO OLQFXOWPTQTLDP-UHFFFAOYSA-N 0.000 description 2
SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
KUDUQBURMYMBIJ-UHFFFAOYSA-N 2-prop-2-enoyloxyethyl prop-2-enoate Chemical compound C=CC(=O)OCCOC(=O)C=C KUDUQBURMYMBIJ-UHFFFAOYSA-N 0.000 description 2
DBCAQXHNJOFNGC-UHFFFAOYSA-N 4-bromo-1,1,1-trifluorobutane Chemical compound FC(F)(F)CCCBr DBCAQXHNJOFNGC-UHFFFAOYSA-N 0.000 description 2
WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 description 2
BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
238000004132 cross linking Methods 0.000 description 2
238000000354 decomposition reaction Methods 0.000 description 2
STVZJERGLQHEKB-UHFFFAOYSA-N ethylene glycol dimethacrylate Substances CC(=C)C(=O)OCCOC(=O)C(C)=C STVZJERGLQHEKB-UHFFFAOYSA-N 0.000 description 2
210000000744 eyelid Anatomy 0.000 description 2
HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 description 2
VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical class CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 description 2
230000002209 hydrophobic effect Effects 0.000 description 2
238000001746 injection moulding Methods 0.000 description 2
229910052751 metal Inorganic materials 0.000 description 2
239000002184 metal Substances 0.000 description 2
FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical class CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 description 2
YPHQUSNPXDGUHL-UHFFFAOYSA-N n-methylprop-2-enamide Chemical compound CNC(=O)C=C YPHQUSNPXDGUHL-UHFFFAOYSA-N 0.000 description 2
238000005498 polishing Methods 0.000 description 2
201000010041 presbyopia Diseases 0.000 description 2
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239000010935 stainless steel Substances 0.000 description 2
229910001220 stainless steel Inorganic materials 0.000 description 2
238000013519 translation Methods 0.000 description 2
PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 1
RWXMAAYKJDQVTF-UHFFFAOYSA-N 2-(2-hydroxyethoxy)ethyl prop-2-enoate Chemical compound OCCOCCOC(=O)C=C RWXMAAYKJDQVTF-UHFFFAOYSA-N 0.000 description 1
YATYDCQGPUOZGZ-UHFFFAOYSA-N 2-(2-hydroxypropoxy)propan-1-ol;prop-2-enoic acid Chemical compound OC(=O)C=C.CC(O)COC(C)CO YATYDCQGPUOZGZ-UHFFFAOYSA-N 0.000 description 1
JJBFVQSGPLGDNX-UHFFFAOYSA-N 2-(2-methylprop-2-enoyloxy)propyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC(C)COC(=O)C(C)=C JJBFVQSGPLGDNX-UHFFFAOYSA-N 0.000 description 1
OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 1
VHSHLMUCYSAUQU-UHFFFAOYSA-N 2-hydroxypropyl methacrylate Chemical compound CC(O)COC(=O)C(C)=C VHSHLMUCYSAUQU-UHFFFAOYSA-N 0.000 description 1
CFVWNXQPGQOHRJ-UHFFFAOYSA-N 2-methylpropyl prop-2-enoate Chemical compound CC(C)COC(=O)C=C CFVWNXQPGQOHRJ-UHFFFAOYSA-N 0.000 description 1
VFZKVQVQOMDJEG-UHFFFAOYSA-N 2-prop-2-enoyloxypropyl prop-2-enoate Chemical compound C=CC(=O)OC(C)COC(=O)C=C VFZKVQVQOMDJEG-UHFFFAOYSA-N 0.000 description 1
RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
229910000906 Bronze Inorganic materials 0.000 description 1
102000008186 Collagen Human genes 0.000 description 1
108010035532 Collagen Proteins 0.000 description 1
FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 1
FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 description 1
FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 1
LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
229930195725 Mannitol Natural products 0.000 description 1
VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
239000011837 N,N-methylenebisacrylamide Substances 0.000 description 1
239000004698 Polyethylene Substances 0.000 description 1
239000004743 Polypropylene Substances 0.000 description 1
239000004793 Polystyrene Substances 0.000 description 1
229910000831 Steel Inorganic materials 0.000 description 1
UWHCKJMYHZGTIT-UHFFFAOYSA-N Tetraethylene glycol, Natural products OCCOCCOCCOCCO UWHCKJMYHZGTIT-UHFFFAOYSA-N 0.000 description 1
GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
206010047513 Vision blurred Diseases 0.000 description 1
125000005396 acrylic acid ester group Chemical group 0.000 description 1
230000002411 adverse Effects 0.000 description 1
150000001298 alcohols Chemical class 0.000 description 1
125000001931 aliphatic group Chemical group 0.000 description 1
229910045601 alloy Inorganic materials 0.000 description 1
239000000956 alloy Substances 0.000 description 1
150000001412 amines Chemical class 0.000 description 1
238000013459 approach Methods 0.000 description 1
230000005540 biological transmission Effects 0.000 description 1
239000010974 bronze Substances 0.000 description 1
CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
125000004432 carbon atom Chemical group C* 0.000 description 1
238000005119 centrifugation Methods 0.000 description 1
238000012512 characterization method Methods 0.000 description 1
239000003795 chemical substances by application Substances 0.000 description 1
229920001436 collagen Polymers 0.000 description 1
230000006835 compression Effects 0.000 description 1
238000007906 compression Methods 0.000 description 1
230000003750 conditioning effect Effects 0.000 description 1
229920001577 copolymer Polymers 0.000 description 1
KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
238000005520 cutting process Methods 0.000 description 1
230000007547 defect Effects 0.000 description 1
238000013461 design Methods 0.000 description 1
ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
239000003085 diluting agent Substances 0.000 description 1
KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 1
239000006185 dispersion Substances 0.000 description 1
238000006073 displacement reaction Methods 0.000 description 1
AFOSIXZFDONLBT-UHFFFAOYSA-N divinyl sulfone Chemical compound C=CS(=O)(=O)C=C AFOSIXZFDONLBT-UHFFFAOYSA-N 0.000 description 1
229940116441 divinylbenzene Drugs 0.000 description 1
239000003828 free initiator Substances 0.000 description 1
239000011953 free-radical catalyst Substances 0.000 description 1
239000011521 glass Substances 0.000 description 1
230000036571 hydration Effects 0.000 description 1
238000006703 hydration reaction Methods 0.000 description 1
150000004680 hydrogen peroxides Chemical class 0.000 description 1
239000012442 inert solvent Substances 0.000 description 1
230000000977 initiatory effect Effects 0.000 description 1
229910010272 inorganic material Inorganic materials 0.000 description 1
239000011147 inorganic material Substances 0.000 description 1
230000001788 irregular Effects 0.000 description 1
239000000594 mannitol Substances 0.000 description 1
235000010355 mannitol Nutrition 0.000 description 1
150000002734 metacrylic acid derivatives Chemical class 0.000 description 1
150000002739 metals Chemical class 0.000 description 1
229920003145 methacrylic acid copolymer Polymers 0.000 description 1
229940117841 methacrylic acid copolymer Drugs 0.000 description 1
125000005395 methacrylic acid group Chemical group 0.000 description 1
125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
208000001491 myopia Diseases 0.000 description 1
WFKDPJRCBCBQNT-UHFFFAOYSA-N n,2-dimethylprop-2-enamide Chemical compound CNC(=O)C(C)=C WFKDPJRCBCBQNT-UHFFFAOYSA-N 0.000 description 1
ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 description 1
QRWZCJXEAOZAAW-UHFFFAOYSA-N n,n,2-trimethylprop-2-enamide Chemical compound CN(C)C(=O)C(C)=C QRWZCJXEAOZAAW-UHFFFAOYSA-N 0.000 description 1
229940088644 n,n-dimethylacrylamide Drugs 0.000 description 1
YLGYACDQVQQZSW-UHFFFAOYSA-N n,n-dimethylprop-2-enamide Chemical compound CN(C)C(=O)C=C YLGYACDQVQQZSW-UHFFFAOYSA-N 0.000 description 1
229910052759 nickel Inorganic materials 0.000 description 1
150000001451 organic peroxides Chemical class 0.000 description 1
239000003960 organic solvent Substances 0.000 description 1
RPQRDASANLAFCM-UHFFFAOYSA-N oxiran-2-ylmethyl prop-2-enoate Chemical class C=CC(=O)OCC1CO1 RPQRDASANLAFCM-UHFFFAOYSA-N 0.000 description 1
WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
229920001515 polyalkylene glycol Polymers 0.000 description 1
229920000573 polyethylene Polymers 0.000 description 1
229920005862 polyol Polymers 0.000 description 1
150000003077 polyols Chemical class 0.000 description 1
229920001155 polypropylene Polymers 0.000 description 1
229920002223 polystyrene Polymers 0.000 description 1
USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
LYBIZMNPXTXVMV-UHFFFAOYSA-N propan-2-yl prop-2-enoate Chemical compound CC(C)OC(=O)C=C LYBIZMNPXTXVMV-UHFFFAOYSA-N 0.000 description 1
PNXMTCDJUBJHQJ-UHFFFAOYSA-N propyl prop-2-enoate Chemical compound CCCOC(=O)C=C PNXMTCDJUBJHQJ-UHFFFAOYSA-N 0.000 description 1
239000005297 pyrex Substances 0.000 description 1
238000007348 radical reaction Methods 0.000 description 1
239000000376 reactant Substances 0.000 description 1
239000012429 reaction media Substances 0.000 description 1
239000011347 resin Substances 0.000 description 1
229920005989 resin Polymers 0.000 description 1
229910052708 sodium Inorganic materials 0.000 description 1
239000011734 sodium Substances 0.000 description 1
239000000243 solution Substances 0.000 description 1
239000000600 sorbitol Substances 0.000 description 1
239000010959 steel Substances 0.000 description 1
150000005846 sugar alcohols Polymers 0.000 description 1
ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
229920002554 vinyl polymer Polymers 0.000 description 1
230000004304 visual acuity Effects 0.000 description 1

Landscapes

Eyeglasses (AREA)

CA 2019685 1990-06-22 1990-06-22 Lentille composite et methode de fabrication Expired - Fee Related CA2019685C (fr)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
CA 2019685 CA2019685C (fr)	1990-06-22	1990-06-22	Lentille composite et methode de fabrication

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CA 2019685 CA2019685C (fr)	1990-06-22	1990-06-22	Lentille composite et methode de fabrication

Publications (2)

Publication Number	Publication Date
CA2019685A1 CA2019685A1 (fr)	1991-12-22
CA2019685C true CA2019685C (fr)	1999-09-07

Family

ID=4145317

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA 2019685 Expired - Fee Related CA2019685C (fr)	1990-06-22	1990-06-22	Lentille composite et methode de fabrication

Country Status (1)

Country	Link
CA (1)	CA2019685C (fr)

1990
- 1990-06-22 CA CA 2019685 patent/CA2019685C/fr not_active Expired - Fee Related

Also Published As

Publication number	Publication date
CA2019685A1 (fr)	1991-12-22

Legal Events

Date	Code	Title	Description
1997-03-04	EEER	Examination request
2005-06-22	MKLA	Lapsed

Publication	Publication Date	Title
US5076683A (en)	1991-12-31	Spuncast compound contact lens
EP0079952B1 (fr)	1986-10-15	Moules et procede de production de verres de contact tronques
US5406341A (en)	1995-04-11	Toric single vision, spherical or aspheric bifocal, multifocal or progressive contact lenses and method of manufacturing
US4208365A (en)	1980-06-17	Method and apparatus for molding toric contact lenses
US4208364A (en)	1980-06-17	Process for the production of contact lenses
JPH01247121A (ja)	1989-10-03	眼球内植体成形型及び内植体製造方法
CA1176414A (fr)	1984-10-23	Verres de contact moules toriques
US4681295A (en)	1987-07-21	Tricurve optical metal master mold and method of making
EP0145516B1 (fr)	1988-05-04	Dispositif de coupe et procédé pour ébavurer exactement le bord d'une lentille de contact coulée
AU569089B2 (en)	1988-01-21	Improvements relating to molding hydrosel contact lenses
US4534723A (en)	1985-08-13	Cutting device for the precision trimming of the edge of a centrifugally cast lens
US4584148A (en)	1986-04-22	Method for the precision trimming of the edge of a centrifugally cast lens
CA2019685C (fr)	1999-09-07	Lentille composite et methode de fabrication
US5066431A (en)	1991-11-19	Method of making toric contact lenses
JP2950866B2 (ja)	1999-09-20	スパン注型複合レンズ及び製造方法
JPH0577487B2 (fr)	1993-10-26
CA1218545A (fr)	1987-03-03	Moules et methode de fabrication de verres de contact trongues
IE52078B1 (en)	1987-06-10	Molded toric contact lenses