Self-conscious type eye examining apparatus

Details Self-conscious type eye examining apparatus Self-conscious type eye examining apparatus

1987-09-01

1989-01-17

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

351234, A61B 302

Patent

active

047984570

ABSTRACT:
A self-conscious type eye examining apparatus is provided with a Stokes' cross cylinder in a view field window, a spherical lens group having a plurality of spherical lenses selectively disposed in the optical path of the cross cylinder, a first electric rotating device coupled to the cross cylinder to rotate the cross cylinder independently, a second electric rotating device for inserting a predetermined lens of the spherical lens group into the view field window, and a control device for controlling the rotations of the first and second electric rotating devices in a predetermined relation.

REFERENCES:
patent: 3860330 (1975-01-01), Persson
patent: 3969020 (1976-07-01), Lynn et al.
patent: 4185896 (1980-01-01), Buhler
patent: 4192582 (1980-03-01), Aoki et al.
patent: 4385813 (1983-05-01), Klein et al.
patent: 4496226 (1985-01-01), Augusto et al.
Duane, Clinical Ophthalmology, vol. 1, Harper & Row; Chapter 38, 1978.

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