Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1999-06-11
2000-04-18
Manuel, George
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
A61B 310
Patent
active
060506873
ABSTRACT:
A system, and its method, for measuring the optical properties of an eye employs optical components for detecting both the reflection of a first light beam from the anterior surface of the eye, and the reflection of a second light beam from the retina of the eye. Sensors are included to receive and separate each of these reflected light beams into a plurality of individual beams, each having its own specific optical path length. The optical path lengths of individual beams reflected from the cornea are collectively used to create a topographical map of the cornea's anterior surface and the optical path lengths of individual beams reflected from the retina are collectively used to create an acuity map of the entire eye. Further, there are additional optical components which respectively determine the position of the eye, a length for the eye and an aberration for the relaxed lens of the eye. A computer is then used to compare the topographical map with the acuity map, while compensating for the lens aberration, to construct a topography for the posterior surface of the cornea.
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Bille Josef
Loesel Frieder
20/10 Perfect Vision Optische Geraete GmbH
Manuel George
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