Method and apparatus for perimetry

Details Method and apparatus for perimetry Method and apparatus for perimetry

1989-12-11

1992-05-19

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

For interpupillary distance measuring or lens positioning

351206, 351211, 351221, 351224, A61B 302

Patent

active

051142228

ABSTRACT:
A perimetry system uses pupillary light response to a small bright light spot or other suitable stimulus which moves at a constant speed in generally a circular path centered on a fixation mark upon which the patient's field of view is fixed. The pattern traced by the spot may be a spiral, starting at the periphery and shrinking toward the fixation mark. A measuring system continuously monitors pupil size and if the retinal image of the moving light spot moves across a region of reduced sensitivity, this event is signaled by a change in pupil size.

REFERENCES:
patent: 4012128 (1977-03-01), Regan
patent: 4169664 (1979-10-01), Bailey, Jr.
patent: 4370033 (1983-01-01), Kani et al.
patent: 4822162 (1989-04-01), Richardson et al.
patent: 4850691 (1989-07-01), Gardner et al.
patent: 5042937 (1991-08-01), Cornsweet

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