Apparatus and method for determining the symmetry of a surface

Details Apparatus and method for determining the symmetry of a surface Apparatus and method for determining the symmetry of a surface

1986-11-03

1989-05-30

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351211, A61B 310

Patent

active

048345296

ABSTRACT:
Disclosed is an apparatus and method for determining the symmetry of a light reflecting surface by superimposition and comparison of a first reflected image ("first image") upon the same image ("second image") which has been rotated, relative to the first image, in a common plane about a common axis; wherein such apparatus and method find preferred application in keratometers and keratometry.

REFERENCES:
patent: 4355871 (1982-10-01), Nevyas et al.

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