| |
 |
|
Class Information
Number: 351/235
Name: Optics: eye examining, vision testing and correcting > Eye examining or testing instrument > Subjective type > Lens or filter selectively insertable in optical path > Mounted on rotatable disc > Having plural disc carrier
Description: Subject matter wherein two eye testing units, one for each eye, are supported on a standard, each of the units comprising a plurality of rotatable test lens discs, which are superposed and mounted on or in the same housing or baseplate on a common central axis.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7438416 |
Optometric apparatus |
Oct. 21, 2008 |
| 7241013 |
Optometric apparatus |
Jul. 10, 2007 |
| 7144112 |
Optometric apparatus |
Dec. 5, 2006 |
| 6923541 |
Optometric apparatus |
Aug. 2, 2005 |
| 6666555 |
Ophthalmic refractor having retrofittable readout illumination |
Dec. 23, 2003 |
| 5812241 |
Compact refractor for subjective examination of human eyes |
Sep. 22, 1998 |
| 5648833 |
Motorized instrument for the examination of human eyes |
Jul. 15, 1997 |
| 5319399 |
Optical alignment device |
Jun. 7, 1994 |
| 5285224 |
Methods and apparatus for determining refractive error |
Feb. 8, 1994 |
| 5278593 |
Ophthalmic dial advancement system |
Jan. 11, 1994 |
| 5220362 |
Ophthalmic lighting apparatus |
Jun. 15, 1993 |
| 5120124 |
Devices for determining the crossed cylinder powers and axes for multiple lens sets |
Jun. 9, 1992 |
| 5104214 |
Trial frames, adjustable spectacles and associated lens systems |
Apr. 14, 1992 |
| 4943162 |
Astigmatic self-refractor and method of use |
Jul. 24, 1990 |
| 4887897 |
Eye examining apparatus |
Dec. 19, 1989 |
| 4840479 |
Crossed cylinder lenses refractor with three-lens variable crossed cylinder assembly and method of use |
Jun. 20, 1989 |
| 4820040 |
Crossed cylinder lenses refractor and method of use |
Apr. 11, 1989 |
| 4798457 |
Self-conscious type eye examining apparatus |
Jan. 17, 1989 |
| 4606624 |
Refractor having simplified cylinder lens assembly |
Aug. 19, 1986 |
| 4606623 |
Method for measuring intraoperative and immediate postoperative effects of radial keratotomy |
Aug. 19, 1986 |
| 4537480 |
Motor-driven subjective phorometer |
Aug. 27, 1985 |
| 4523822 |
Refractor with optically encoded cylinder axis position |
Jun. 18, 1985 |
| 4496225 |
Motor control system for motorized ophthalmic instrument |
Jan. 29, 1985 |
| 4496226 |
ANDed motor control system for motorized ophthalmic instrument |
Jan. 29, 1985 |
| 4436390 |
Ophthalmic instrument having a cross cylinder lens |
Mar. 13, 1984 |
| 4426140 |
Refractor suspension system |
Jan. 17, 1984 |
| 4413891 |
Refractor optical system |
Nov. 8, 1983 |
| 4385813 |
Phoropter |
May. 31, 1983 |
| 4215919 |
Refractor optical system |
Aug. 5, 1980 |
| 4185896 |
Refractor cross-cylinder apparatus |
Jan. 29, 1980 |
|
|
|
