Method and apparatus for measuring the shape of the eye

Details Method and apparatus for measuring the shape of the eye Method and apparatus for measuring the shape of the eye

1981-05-28

1986-04-22

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351221, A61B 310

Patent

active

045838305

ABSTRACT:
Two plane-parallel prisms are placed in the optical axis of the examined eye, fitting close to each other in a horizontal plane lying in the optical axis. The prisms are rotated relative to one another in opposite directions at the same angle with respect to the optical axis, and having their parallel vertical optical surfaces parallel with their axis of rotation which intersects the optical axis. One prism is fixed to a scale. Two light sources are placed in a horizontal plane which passes through the optical axis and which are movable independently of one another, while their position with respect to the optical axis and to the examined eye is indicated on respectively associated scale.

REFERENCES:
patent: 3765753 (1973-10-01), Zarraga
patent: 4157859 (1979-06-01), Terry

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