Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Folding
Patent
1978-08-15
1982-06-15
Corbin, John K.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Folding
351 23, A61B 300, A61B 302
Patent
active
043347398
ABSTRACT:
Threshold values which are ascertained during successive static perimetric examinations of the visual field of a subject by presenting variable-intensity stimuli to selected points of a test field are permanently recorded in the form of a single graphic display. The printer which makes the permanent record is connected with a computer which controls the sequence of presentation of stimuli during each examination. If the points of presentation of stimuli overlap, the computer ascertains the arithmetic mean of corresponding threshold values which are ascertained during successive examinations or subtracts one threshold value from the other (corresponding) threshold value. Such modified threshold values are also displayed on the record, together with threshold values which are interpolated by the computer between those threshold values which are ascertained during perimetric examination.
REFERENCES:
patent: 3664732 (1972-05-01), Lynn
patent: 3718386 (1973-02-01), Lynn et al.
patent: 4145123 (1979-03-01), Krahn
Bedwell, American Journal of Opotometry and Archives of American Academy of Optometry, 10/67.
Bovernick Rodney
Corbin John K.
Interzeag AG
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