Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1993-11-12
1994-10-25
Sikes, William L.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351160R, 351205, A61B 300
Patent
active
053593731
ABSTRACT:
A high resolution contact lens structure increases the numerical aperture of a long working distance microscope, while correcting the chromatic and spherical aberrations generated at the surface between the lens structure and the cornea. The structure in one embodiment has a front plate element having two parallel flat lens surfaces. A first lens element has a flat first lens surface in contact with the plate, and a concave second surface. A second lens element has a convex first lens surface in contact with the concave second surface of the first lens element, and a convex second lens surface. The lens element thicknesses, lens surface radii and indices of dispersion and refraction of the lenses are selected to increase the numerical aperture of the microscope.
REFERENCES:
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D. Maurice, Cellular Membrane Activity in the Corneal Endothelium of the Intact Eye, Experiencia, 24: 1094-95 (1968).
D. Maurice, A Scanning Mirror Microscope, Invest. Ophthalmol. 13: 1033-37, (1974).
C. J. Koester, Scanning Mirror Microscope with Optical Sectioning Characteristics: Applications in Ophthalmology, Appl. Optics 19:1749-57, (1980).
H. D. Cavanagh, J. V. Jester, J. Essepian, W. Shields, and M. A. Lemp, Confocal Microscopy of the Living Eye, CLAO J 16: 65-73, (1990).
O. N. Serdarevic and C. J. Koester, Colour Wide Field Specular Microscopic Investigation of Corneal Surface Disorders, Trans. Ophthalmol. Soc. UK 104: 439-45, (1985).
Koester Charles J.
Tackaberry Robert B.
Dang Hung Xuan
Sikes William L.
The Trustees of Columbia University in the City of New York
White John P.
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