Ophthalmic measuring apparatus

Details Ophthalmic measuring apparatus Ophthalmic measuring apparatus

1986-09-10

1988-08-16

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351212, 128660, A61B 310, A61B 810

Patent

active

047640065

ABSTRACT:
An ophthalmic measuring apparatus has an ultrasonic detector for measuring the length of a predetermined region of an eye to be examined, a device provided with a center axis coaxial with the center axis of the vibrator of the ultrasonic detector and projecting an index mark onto the cornea of the eye to be examined, and an imaging optical system for forming the corneal reflection image of the index mark on a predetermined image plane to measure the shape of the cornea.

REFERENCES:
patent: 3821891 (1974-07-01), Collins et al.
patent: 4227780 (1980-10-01), Ohta et al.
patent: 4546773 (1985-10-01), Kremer et al.
patent: 4598714 (1986-07-01), Kremer et al.

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