Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1996-11-27
1998-08-18
Mai, Huy
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351246, A61B 310
Patent
active
057964637
ABSTRACT:
An apparatus to improve the operation of an autorefractor includes a first circuit to obtain objective refraction data and a second circuit to receive patient age data. An autorefractor output adjustment device is connected to the first circuit and the second circuit to combine the objective refraction data with a weight factor, which is assigned as a function of the patient age data and optometric clinical judgment, to obtain an eyeglass lens specification. The autorefractor output adjustment device may also rely upon eyeglass lens prescription data. The apparatus may be implemented in an autorefractor or it may be constructed as an external unit. The autorefractor output adjustment device may be implemented with a digital logic circuit executing a program or as a hardwired circuit.
REFERENCES:
patent: 5414478 (1995-05-01), Van Gelderen
patent: 5610671 (1997-03-01), Hosoi et al.
Edlefsen et al., "Second Opinion: a computer expert system designed to aid in the determination of spectacle lens prescriptions", J. of the Am. Optometric Assoc. 66(10):620-630 (1995).
Galliani William S.
Mai Huy
The Regents of the University of California
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