Method and device for ophthalmoscopy
AssigneeOlympus Optical Co., Ltd.
InventorsHiroyuki Shimizu, Kouji Inaba, Ken-Ichi Nakahashi
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Abstract
A method and device for ophthalmoscopy for observing fundus oculi by a binocular ophthalmoscope through a contact lens arranged in contact with an eyeball to be observed, said method and device for ophthalmoscopy enabling to observe the fundus by a multiplied erect image from a position distant from the examinee.
Claims8
A method for ophthalmoscopy comprising the steps of arranging a contact lens in contact with an eyeball to be observed in order to observe the eyeball by eliminating refraction of light by the surface of the cornea of the eyeball, illuminating the fundus of the eyeball by transmitting illuminating light through a plurality of optical fiber bundles having exit ends arranged along the circumference of the contact lens and entrance ends arranged opposite to a light source, and observing a magnified erect image by means of a head-band scope comprising a binocular telescopic optical system arranged opposite to and distant from the contact lens.
A device for ophthalmoscopy comprising a contact lens, a plurality of optical fiber bundles having exit ends fixed along the circumference of said contact lens by inclining said exit ends by 10.degree. through 20.degree. with respect to the optical axis of the contact lens, a tubular holder carrying said contact lens at one end thereof and carrying said optical fiber bundles arranged in substantially longitudinal direction of the holder, and a selector shutter arranged adjacent to entrance ends of said optical fiber bundles for the purpose of selectively transmitting the illuminating light by means of said optical fiber bundles, said device for ophthalmoscopy being arranged to selectively transmit illuminating light by means of at least one of said optical fiber bundles by operating said selector shutter for the purpose of illuminating the fundus of the eyeball to be observed and arranged to observe through said holder from a position corresponding to the exit end of the selected optical fiber bundle.
Dependencies are inferred from the claim text.