GB1561892A - Lens and method and apparatus for forming the same - Google Patents
Lens and method and apparatus for forming the same Download PDFInfo
- Publication number
- GB1561892A GB1561892A GB4143176A GB4143176A GB1561892A GB 1561892 A GB1561892 A GB 1561892A GB 4143176 A GB4143176 A GB 4143176A GB 4143176 A GB4143176 A GB 4143176A GB 1561892 A GB1561892 A GB 1561892A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- curve
- radius
- central
- bonnetslug
- Prior art date
- 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
Links
- 238000000034 method Methods 0.000 title claims description 29
- 230000004438 eyesight Effects 0.000 claims description 31
- 238000000926 separation method Methods 0.000 claims description 29
- 238000012937 correction Methods 0.000 claims description 19
- 208000001491 myopia Diseases 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 14
- 230000003287 optical effect Effects 0.000 claims description 11
- 239000002131 composite material Substances 0.000 claims description 10
- 210000004087 cornea Anatomy 0.000 claims description 9
- 238000013461 design Methods 0.000 claims description 7
- 238000003754 machining Methods 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- 238000005498 polishing Methods 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 5
- 238000002788 crimping Methods 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 230000001419 dependent effect Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000007796 conventional method Methods 0.000 claims description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 2
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 9
- 230000002093 peripheral effect Effects 0.000 description 7
- 201000010041 presbyopia Diseases 0.000 description 7
- 230000004304 visual acuity Effects 0.000 description 4
- 230000002350 accommodative effect Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 208000029257 vision disease Diseases 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/04—Contact lenses for the eyes
- G02C7/041—Contact lenses for the eyes bifocal; multifocal
- G02C7/044—Annular configuration, e.g. pupil tuned
-
- 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
- B29D11/00019—Production of simple or compound lenses with non-spherical faces, e.g. toric faces
-
- 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
- B29D11/00028—Bifocal lenses; Multifocal lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/10—Bifocal lenses; Multifocal lenses
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/04—Contact lenses for the eyes
- G02C7/041—Contact lenses for the eyes bifocal; multifocal
- G02C7/042—Simultaneous type
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- General Health & Medical Sciences (AREA)
- Eyeglasses (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US62078675A | 1975-10-08 | 1975-10-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1561892A true GB1561892A (en) | 1980-03-05 |
Family
ID=24487387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4143176A Expired GB1561892A (en) | 1975-10-08 | 1976-10-06 | Lens and method and apparatus for forming the same |
Country Status (8)
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2826436A1 (de) * | 1977-07-25 | 1979-02-08 | American Optical Corp | Gegossene kontaktlinsen, vorrichtung und verfahren zum herstellen derselben |
| GB2132785A (en) * | 1982-12-23 | 1984-07-11 | Nat Patent Dev Corp | Thin aphakic contact lens |
| DE3415022A1 (de) * | 1983-04-21 | 1984-10-25 | Benjamin Westbury N.Y. Nuchman | Ununterbrochen variable kontaktlinse |
| GB2192291A (en) * | 1986-03-04 | 1988-01-06 | Anil K Gupta | Progressive power contact lens |
| GB2327283A (en) * | 1997-06-04 | 1999-01-20 | Bausch & Lomb | Manufacture of a rigid contact lens with a smooth, aspherical back surface |
| GB2423828A (en) * | 2005-03-03 | 2006-09-06 | Peter John Charles Spurgeon | Magnifying device with areas of different magnification |
| GB2632202A (en) * | 2023-07-25 | 2025-01-29 | Coopervision Int Ltd | Contact lenses and methods relating thereto |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1979000082A1 (en) * | 1977-08-02 | 1979-02-22 | Automated Optics | Method and apparatus adapted for automatic or semi-automatic fabrication of ultra-precision ophthalmic lenses,e.g.,contact lenses |
| FR2509483A1 (fr) * | 1981-04-15 | 1983-01-14 | Essilor Int | Lentille de contact |
| US5417306A (en) * | 1993-06-03 | 1995-05-23 | Robl; William A. | Tree climbing apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS493595A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1972-04-21 | 1974-01-12 |
-
1976
- 1976-10-01 BE BE171184A patent/BE846873A/xx unknown
- 1976-10-04 FR FR7629795A patent/FR2327562A1/fr active Granted
- 1976-10-05 LU LU75941A patent/LU75941A1/xx unknown
- 1976-10-06 BR BR7606688A patent/BR7606688A/pt unknown
- 1976-10-06 GB GB4143176A patent/GB1561892A/en not_active Expired
- 1976-10-07 NL NL7611086A patent/NL7611086A/xx not_active Application Discontinuation
- 1976-10-07 IT IT6941776A patent/IT1075969B/it active
- 1976-10-08 JP JP12048976A patent/JPS5246826A/ja active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2826436A1 (de) * | 1977-07-25 | 1979-02-08 | American Optical Corp | Gegossene kontaktlinsen, vorrichtung und verfahren zum herstellen derselben |
| GB2132785A (en) * | 1982-12-23 | 1984-07-11 | Nat Patent Dev Corp | Thin aphakic contact lens |
| DE3415022A1 (de) * | 1983-04-21 | 1984-10-25 | Benjamin Westbury N.Y. Nuchman | Ununterbrochen variable kontaktlinse |
| GB2192291A (en) * | 1986-03-04 | 1988-01-06 | Anil K Gupta | Progressive power contact lens |
| GB2192291B (en) * | 1986-03-04 | 1990-08-22 | Gupta Anil K | Progressive power contact lens. |
| GB2327283A (en) * | 1997-06-04 | 1999-01-20 | Bausch & Lomb | Manufacture of a rigid contact lens with a smooth, aspherical back surface |
| GB2327283B (en) * | 1997-06-04 | 2002-02-27 | Bausch & Lomb | Manufacture of contact lenses |
| GB2423828A (en) * | 2005-03-03 | 2006-09-06 | Peter John Charles Spurgeon | Magnifying device with areas of different magnification |
| GB2632202A (en) * | 2023-07-25 | 2025-01-29 | Coopervision Int Ltd | Contact lenses and methods relating thereto |
Also Published As
| Publication number | Publication date |
|---|---|
| BR7606688A (pt) | 1977-11-16 |
| FR2327562A1 (fr) | 1977-05-06 |
| NL7611086A (nl) | 1977-04-13 |
| JPS5246826A (en) | 1977-04-14 |
| IT1075969B (it) | 1985-04-22 |
| LU75941A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1977-05-25 |
| BE846873A (fr) | 1977-04-01 |
| FR2327562B3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1979-06-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| CSNS | Application of which complete specification have been accepted and published, but patent is not sealed |