Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – For fusion and space perception testing
Patent
1993-11-01
1994-11-29
Gross, Anita Pellman
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
For fusion and space perception testing
351204, 351243, 351246, 12866106, A61B 302, A61B 810
Patent
active
053694546
ABSTRACT:
An apparatus for assuring vertical alignment of visual axes of a patient's eyes includes an eye cup that enables establishment of a liquid bath in which a surface of a cornea of a supine patient's first eye is completely submerged. A first light source is positioned above the liquid bath and directs a beam of alignment light to the submerged eye. A second light source is positioned above the patient's second eye and directs a beam of adjustment light to its corneal surface. Apparatus is provided that enables relative movement between the first and second light sources so as to enable the light sources to be moved into a position where the patient indicates a fusion of the light sources into a single spot, at which point it is known that the visual axis are vertical and aligned. The liquid bath assures that the beam of alignment light from the first light source is only in focus at the patient's eye when the first light source is directly coincident with the vertical axis of the first eye. Any deviation from that vertical axis results in blurring of the image due to refractive effects within the liquid bath.
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Coleman Donald J.
Reinstein Dan Z.
Silverman Ronald H.
Cornell Research Foundation Inc.
Gross Anita Pellman
Parsons David R.
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