Dynamic optometer

Details Dynamic optometer Dynamic optometer

1986-07-03

1988-09-20

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351221, A61B 310

Patent

active

047721146

ABSTRACT:
In a dynamic optometer, a variation in the direction of a subject's eye, namely, in the direction of gaze is measured by a direction detector to tilt a bi-axial rocking mirror according to the output of the detector, and an actual image of an eyeball formed by a pair of concave spherical mirrors is reflected to an optical system by the rocking mirror varying the direction of incidence. A second actual image which is formed immediately before a light source by the optical system is stably fixated in one direction, so that the eye is irradiated with light constantly from the front side in spite of eye movements. Accordingly, the refractive power can be measured, unaffected by the movement of an eyeball.

REFERENCES:
patent: 4264152 (1981-04-01), Crane
patent: 4373787 (1983-02-01), Crane et al.

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