Apparatus for measuring the spherical surface of the cornea

Details Apparatus for measuring the spherical surface of the cornea Apparatus for measuring the spherical surface of the cornea

1994-05-24

1995-03-14

Sikes, William L.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351247, A61B 310

Patent

active

053980840

ABSTRACT:
An apparatus for measuring the spherical surface of the cornea including an annular mounting frame for fastening to the microscope barrel of a refracting unit, two contact metal springs concentrically fastened to the annular mounting frame at the bottom, a centering device suspended within the annular mounting frame to hold a light emitting diode at the center of the annular mounting frame, an annular light holder fastened to the annular mounting frame at the bottom to hold a series of light emitting diodes permitting them to be abutted against one another around a circle, and a lens grip fastened to the annular mounting frame at the bottom to hold down the annular light holder and having a lens on the inside for condensing the light of the light emitting diodes of the annular light holder into a ring of light for projecting onto the spherical surface of the cornea for measuring refraction of the eye.

REFERENCES:
patent: 4660947 (1987-04-01), Amoils

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