CA598683A - Eye testing instruments - Google Patents
Eye testing instrumentsInfo
- Publication number
- CA598683A CA598683A CA598683A CA598683DA CA598683A CA 598683 A CA598683 A CA 598683A CA 598683 A CA598683 A CA 598683A CA 598683D A CA598683D A CA 598683DA CA 598683 A CA598683 A CA 598683A
- Authority
- CA
- Canada
- Prior art keywords
- testing instruments
- eye testing
- eye
- instruments
- testing
- 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
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA598683T |
Publications (1)
Publication Number | Publication Date |
---|---|
CA598683A true CA598683A (en) | 1960-05-24 |
Family
ID=35814459
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA598683A Expired CA598683A (en) | Eye testing instruments |
Country Status (1)
Country | Link |
---|---|
CA (1) | CA598683A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4820040A (en) * | 1984-11-09 | 1989-04-11 | Sims Clinton N | Crossed cylinder lenses refractor and method of use |
US4840479A (en) * | 1984-11-09 | 1989-06-20 | Sims Clinton N | Crossed cylinder lenses refractor with three-lens variable crossed cylinder assembly and method of use |
US4943162A (en) * | 1984-11-09 | 1990-07-24 | Sims Clinton N | Astigmatic self-refractor and method of use |
US5120124A (en) * | 1984-11-09 | 1992-06-09 | Sims Clinton N | Devices for determining the crossed cylinder powers and axes for multiple lens sets |
US5278593A (en) * | 1992-03-18 | 1994-01-11 | Woodlyn, Inc. | Ophthalmic dial advancement system |
US5285224A (en) * | 1984-11-09 | 1994-02-08 | Sims Clinton N | Methods and apparatus for determining refractive error |
US5430508A (en) * | 1984-11-09 | 1995-07-04 | Sims; Clinton N. | Refraction techniques using modified streak retinoscope assembly |
US5500698A (en) * | 1984-11-09 | 1996-03-19 | Sims; Clinton N. | Optical instruments such as retinoscopes which may incorporate multiple lens assemblies and methods of calibrating such instruments |
-
0
- CA CA598683A patent/CA598683A/en not_active Expired
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4820040A (en) * | 1984-11-09 | 1989-04-11 | Sims Clinton N | Crossed cylinder lenses refractor and method of use |
US4840479A (en) * | 1984-11-09 | 1989-06-20 | Sims Clinton N | Crossed cylinder lenses refractor with three-lens variable crossed cylinder assembly and method of use |
US4943162A (en) * | 1984-11-09 | 1990-07-24 | Sims Clinton N | Astigmatic self-refractor and method of use |
US5120124A (en) * | 1984-11-09 | 1992-06-09 | Sims Clinton N | Devices for determining the crossed cylinder powers and axes for multiple lens sets |
US5285224A (en) * | 1984-11-09 | 1994-02-08 | Sims Clinton N | Methods and apparatus for determining refractive error |
US5430508A (en) * | 1984-11-09 | 1995-07-04 | Sims; Clinton N. | Refraction techniques using modified streak retinoscope assembly |
US5500698A (en) * | 1984-11-09 | 1996-03-19 | Sims; Clinton N. | Optical instruments such as retinoscopes which may incorporate multiple lens assemblies and methods of calibrating such instruments |
US5278593A (en) * | 1992-03-18 | 1994-01-11 | Woodlyn, Inc. | Ophthalmic dial advancement system |
US5650839A (en) * | 1993-08-03 | 1997-07-22 | Sims; Clinton N. | Retinoscope assembly with scale |
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