Luminous source for measuring device of the ocular parameters of

Details Luminous source for measuring device of the ocular parameters of Luminous source for measuring device of the ocular parameters of

1986-06-27

1987-03-17

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

For interpupillary distance measuring or lens positioning

351212, 351221, A61B 310, A61B 314

Patent

active

046503005

ABSTRACT:
Luminous source of device for measuring, by means of corneal reflections, the ocular parameters of a subject.
The source comprises a first extended emitting zone globally annular adapted to produce on the cornea of each eye of the subject a reflection observable by the operator of the device and a second punctual emitting zone disposed at the centre of the first emitting zone and constituting the fixation point of the subject's stare.

REFERENCES:
patent: 4046463 (1977-09-01), La Russa et al.
patent: 4196980 (1980-04-01), Heine
patent: 4252420 (1981-02-01), Kohayakawa

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