Screen and method of eye examination using same

Details Screen and method of eye examination using same Screen and method of eye examination using same

1981-03-11

1984-03-20

Corbin, John K.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

A61B 302

Patent

active

044377371

ABSTRACT:
A method for examining the eyes of a patient. A screen for having light and indicia projected thereon from a light and indicia source in the examination of the eyes of a patient having a refraction apparatus over the eyes as in the nature of eyeglasses on the patient. The screen includes a frame, and a screen mounted on the frame. The combined frame-screen is parabolic. A mount attaches to the frame and is capable of permitting positioning the combined frame-screen about both a vertical and a horizontal axis to direct light therefrom. The method comprises positioning the eyes of the patient and the refraction apparatus at a distance from the parabolic screen approximately equal to the radius of the parabolic screen; situating the light and indicia source in front of the screen; projecting light and indicia from the light and indicia source on the screen; and adjusting the combined parabolic screen-frame about both the vertical and horizontal axis to optimumly direct light therefrom through the refraction apparatus.

REFERENCES:
patent: 2872843 (1959-02-01), Kono
patent: 3025755 (1962-03-01), Koetting
patent: 3037424 (1962-06-01), Capetta
patent: 3300269 (1967-01-01), Schultz
patent: 3969020 (1976-07-01), Lynn et al.

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