Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Folding
Patent
1976-07-07
1979-02-13
Sacher, Paul A.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Folding
2481884, A61B 300
Patent
active
041392809
ABSTRACT:
A head rest for instruments used for opthamological examination comprises two vertical columns mounted on the instrument base. Each of said columns carries a vertical post to which is attached a forehead rest spanning the space between the posts. Said posts are retracted with respect to said columns. Said columns also carry a transverse bar spanning the space between the columns and supporting a chin rest which is adjustable with respect to the base. The arrangement provides maximum freedom of movement around the patient's eyes for the physician or surgeon.
REFERENCES:
patent: 2999422 (1961-09-01), Papritz
patent: 3594072 (1971-07-01), Feather
Romuald Schon, A New Compound-Stage with Head Rest, Jena Review, No. 2, 1969, pp. 142-144.
Topcon Instrument Corp. of America, Journal of the Amer. Optometric Assoc., 2/75.
Carl Zeiss-Stiftung
Sacher Paul A.
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