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Class Information
Number: 351/205
Name: Optics: eye examining, vision testing and correcting > Eye examining or testing instrument > Objective type
Description: Subject matter including instruments for examining the eye of a patient independently of the patient"s perceptions of responses, for example, by observing a light or image directed onto or into the eye to diagnose the eye or to ascertain the power of refraction.










Sub-classes under this class:

Class Number Class Name Patents
351/214 Including diaphram or slit 256
351/209 Including eye movement detection 321
351/206 Including eye photography 911
351/221 Including illuminator 1,029
351/216 Including lens selectively insertable in optical path 102
351/213 Including light filter or absorber 85
351/215 Including light polarizing means 52
351/211 Including projected target image 548
351/220 Including reflectors with off-set surfaces 23
351/219 With contact lens 165


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Patent Number Title Of Patent Date Issued
5499066 Optical instrument with a continuously adjustable zoom Mar. 12, 1996
5491524 Optical coherence tomography corneal mapping apparatus Feb. 13, 1996
5490098 Automated system and method for determining pupillary threshold response Feb. 6, 1996
5488443 Portable laser apparatus for ophthalmological operation Jan. 30, 1996
5485229 Method and apparatus for determining electrical activity in the retinal nerve fiber layer using intrinsic birefringent properties of retinal ganglion cell axons Jan. 16, 1996
5479222 Indirect ophthalmoscopy lens system and adapter lenses Dec. 26, 1995
5475451 Ophthalmologic apparatus Dec. 12, 1995
5473392 Method and system for topographic measurement Dec. 5, 1995
5471260 Joystick for an ophthalmic instrument where vertical movement is controlled by rotating the joystick Nov. 28, 1995
5469233 Ophthalmologic instrument Nov. 21, 1995
5450144 Ophthalmologic examination and/or treatment apparatus including illuminator and magnifier assembly Sep. 12, 1995
5450143 Surgical optometer Sep. 12, 1995
5436680 Indirect ophthalmoscopy lens providing apparent image curvature Jul. 25, 1995
5430507 Ophthalmologic apparatus Jul. 4, 1995
5430506 Indirect ophthalmoscopy lens for use with slit lamp biomicroscope Jul. 4, 1995
5430505 High speed eye tracking device and method Jul. 4, 1995
5424789 Optical device for use with a slit lamp biomicroscope Jun. 13, 1995
5414478 Apparatus and method for determining contact lenses May. 9, 1995
5404184 Ophthalmic light irradiation apparatus Apr. 4, 1995
5400092 Binocular ophthalmoscope Mar. 21, 1995
5400091 Ophthalmic instrument Mar. 21, 1995
5396302 Apparatus for producing the image of an object Mar. 7, 1995
5394201 Binocular ophthalmoscope with mirror adjustment Feb. 28, 1995
5394199 Methods and apparatus for improved visualization of choroidal blood flow and aberrant vascular structures in the eye using fluorescent dye angiography Feb. 28, 1995
5387951 Intraocular length measuring instrument capable of avoiding errors in measurement caused by the movement of a subject's eye Feb. 7, 1995
5379079 Attachment device for an exophthalmometer Jan. 3, 1995
5363155 Eye examination apparatus and accessory therefor Nov. 8, 1994
5359669 Remote retinal scan identifier Oct. 25, 1994
5359373 High resolution contact lens structure in combination with a microscope objective Oct. 25, 1994
5359372 Contact lens for intraocular observation Oct. 25, 1994
5357294 Method for displaying optical properties of corneas Oct. 18, 1994
5347327 Process and apparatus for measuring axial eye length Sep. 13, 1994
5347328 Apparatus for measuring an intraocular length between anterior and posterior portions of an eye Sep. 13, 1994
5337095 Ophthalmological instrument Aug. 9, 1994
5333018 Binocular ophthalmoscope Jul. 26, 1994
5333017 Indirect ophthalmoscopy lens for use with slit lamp biomicroscope Jul. 26, 1994
5329321 Intraocular length measuring instrument with rotary optical path length variator Jul. 12, 1994
5325135 Ophthalmologic apparatus having two measuring systems Jun. 28, 1994
5321447 Ophthalmoscopic attachment for a surgical microscope Jun. 14, 1994
5321445 Apparatus and method for visual training as a function of retinal reflection Jun. 14, 1994
5319399 Optical alignment device Jun. 7, 1994
5311225 Device for determining the portion of a field seen by the eye of an observer May. 10, 1994
5298927 Visual axis detecor having a high sensitivity to a light from an eye Mar. 29, 1994
5280312 Visual axis detection apparatus Jan. 18, 1994
5270747 Stereomicroscope with first and second illuminating systems Dec. 14, 1993
5270749 Opthalmic apparatus for measuring the refractive power of a lens Dec. 14, 1993
5268711 Ophthalmoscope Dec. 7, 1993
5258787 Ophthalmologic apparatus Nov. 2, 1993
5255025 Measurement apparatus for indirect ophthalmoscopy Oct. 19, 1993
5252998 Contact eyeglass Oct. 12, 1993

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