BE557424A - - Google Patents
Info
- Publication number
- BE557424A BE557424A BE557424DA BE557424A BE 557424 A BE557424 A BE 557424A BE 557424D A BE557424D A BE 557424DA BE 557424 A BE557424 A BE 557424A
- Authority
- BE
- Belgium
- Prior art keywords
- lens
- horizontal
- radius
- curvature
- optical glass
- Prior art date
Links
- 239000011521 glass Substances 0.000 claims description 19
- 230000000750 progressive effect Effects 0.000 claims description 13
- 201000009310 astigmatism Diseases 0.000 claims description 12
- 239000005304 optical glass Substances 0.000 claims description 8
- 230000007423 decrease Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 230000002687 intercalation Effects 0.000 description 2
- 238000009830 intercalation Methods 0.000 description 2
- 208000014733 refractive error Diseases 0.000 description 2
- 208000029091 Refraction disease Diseases 0.000 description 1
- 208000004350 Strabismus Diseases 0.000 description 1
- 230000004430 ametropia Effects 0.000 description 1
- 230000001447 compensatory effect Effects 0.000 description 1
- 238000005816 glass manufacturing process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 230000035807 sensation Effects 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
- G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive
- G02C7/061—Spectacle lenses with progressively varying focal power
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C2202/00—Generic optical aspects applicable to one or more of the subgroups of G02C7/00
- G02C2202/16—Laminated or compound lenses
Landscapes
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Eyeglasses (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE557424A true BE557424A (de) |
Family
ID=180857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE557424D BE557424A (de) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE557424A (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3623800A (en) * | 1969-10-16 | 1971-11-30 | David Volk | Ophthalmic lens of changing power |
| EP0454554A1 (de) * | 1990-04-25 | 1991-10-30 | ESSILOR INTERNATIONAL Compagnie Générale d'Optique | Verfahren zur Herstellungserleichterung für eine progressive ophthalmische Linse und zugehörige progressive ophthalmische Linse(n) |
-
0
- BE BE557424D patent/BE557424A/fr unknown
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3623800A (en) * | 1969-10-16 | 1971-11-30 | David Volk | Ophthalmic lens of changing power |
| EP0454554A1 (de) * | 1990-04-25 | 1991-10-30 | ESSILOR INTERNATIONAL Compagnie Générale d'Optique | Verfahren zur Herstellungserleichterung für eine progressive ophthalmische Linse und zugehörige progressive ophthalmische Linse(n) |
| FR2661519A1 (fr) * | 1990-04-25 | 1991-10-31 | Essilor Int | Procede pour faciliter la realisation d'une lentille ophtalmique progressive, et lentille(s) ophtalmique(s) progressive(s) correspondante(s). |
| US5235359A (en) * | 1990-04-25 | 1993-08-10 | Essilor International Cie Generale D'optique | Progressive opthalmic lenses and method of facilitating their manufacture |
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