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Class Information
Number: 351/217
Name: Optics: eye examining, vision testing and correcting > Eye examining or testing instrument > Objective type > Including lens selectively insertable in optical path > On rotary disc
Description: Subject matter wherein multiple test lenses are eccentrically mounted on either a single rotary disc or a pair of rotary discs.

Sub-classes under this class:

Class Number Class Name Patents
351/218 Hand held type 58

Patents under this class:

Patent Number Title Of Patent Date Issued
8444269 Digital imaging ophthalmoscope May. 21, 2013
7963653 Digital imaging ophthalmoscope Jun. 21, 2011
7862173 Digital imaging ophthalmoscope Jan. 4, 2011
7794086 Digital imaging ophthalmoscope Sep. 14, 2010
7264354 Method and apparatus for correcting vision using an electro-active phoropter Sep. 4, 2007
7241013 Optometric apparatus Jul. 10, 2007
7198367 Fundus imaging apparatus and fundus imaging method Apr. 3, 2007
7144112 Optometric apparatus Dec. 5, 2006
5812241 Compact refractor for subjective examination of human eyes Sep. 22, 1998
5671039 Glare tester Sep. 23, 1997
5650839 Retinoscope assembly with scale Jul. 22, 1997
5619290 Phase-contrast haploscope and rotary disc for use therewith Apr. 8, 1997
5479221 Hand-held line grid interference retinometer Dec. 26, 1995
5424789 Optical device for use with a slit lamp biomicroscope Jun. 13, 1995
5300965 Corneal shape measuring apparatus Apr. 5, 1994
5223864 Phoropter Jun. 29, 1993
4673265 Procedure and device for automatic refractometric measurement of the degree of ametropia of a human eye Jun. 16, 1987
4580559 Indirect ophthalmoscopic photocoagulation delivery system for retinal surgery Apr. 8, 1986
4385813 Phoropter May. 31, 1983
4196980 Opthalmoscope examination pattern having light transmissive fixation point Apr. 8, 1980
4125320 Retinometer Nov. 14, 1978

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