Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1986-05-27
1987-12-01
Bovernick, Rodney B.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
A61B 310
Patent
active
047100028
ABSTRACT:
A stereoscopic ophthalmoscope for use with a condensing lens to observe the fundus of a patient's eye, the ophthalmoscope having a left eyepiece and a right eyepiece, a light source for directing light into the patient's eye so that an image of the patient's eye is focused by the condensing lens in a focal plane perpendicular to an optical axis, the ophthalmoscope having the improvements consisting of an image-splitting device for splitting the image into a left image and a right image travelling along a left optical path and a right optical path, respectively, left and right image-rotating devices arranged in optical alignment with the image-splitting device for inverting and reversing each of the left and right images from the image-splitting device, and left and right magnifying devices, each including an objective lens and an ocular lens and each arranged in optical alignment with the respective image-rotating devices to magnify the image therefrom and to transmit that image to the respective eyepiece.
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K. E. Schirmer, "The Upright Fundus Image in Indirect Opthalmoscopy", Arch Opthal., vol. 77, Jan. 1967, pp. 67-70.
Bovernick Rodney B.
Eye Research Institute of Retina Foundation
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