Fixation card attachment for retinoscope

Details Fixation card attachment for retinoscope Fixation card attachment for retinoscope

1991-09-11

1993-04-13

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351218, 351216, A61B 310

Patent

active

052027104

ABSTRACT:
A fixation card attachment for an eye examination instrument that enables the card to be positioned in reference to the optical path of the instrument so that the patient undergoing examination must refocus his or her eye when reading indicia on the card. The card is secured to the instrument by use of a magnetic coupling. The magnetic coupling includes a permanent magnet encapsulated in the front face of the examination instrument and a magnetic strip provided on the back of the fixation card.

REFERENCES:
patent: 4063806 (1977-12-01), LeVantine

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