Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1981-10-30
1984-04-03
Corbin, John K.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351206, A61B 310, A61B 314
Patent
active
044404778
ABSTRACT:
A method and device for measuring the optical power of the cornea is provided. The device comprises a light source to illuminate the cornea, apparatus for forming a profile image of the cornea, apparatus for measuring the actual image distance from the anterior corneal surface, processing apparatus for calculating the radius of curvature and dioptric power of the cornea and display apparatus for displaying the calculated data. The method of the present invention comprises illuminating the cornea with a light source, forming a profile image of the cornea, measuring the actual image distance from the anterior corneal surface and calculating the anterior radius of curvature and dioptric power of the cornea.
REFERENCES:
patent: 4159867 (1979-07-01), Achatz
Bovernick Rodney B.
Corbin John K.
Howison Gregory M.
Medlock Nina
Mills Jerry W.
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