Optometric apparatus

Details Optometric apparatus Optometric apparatus

1998-02-10

2000-04-04

Manuel, George

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

A61B 300

Patent

active

060452250

ABSTRACT:
An optometric apparatus capable of effecting the examination efficiently by reducing the amount of power adjustment by the examiner. A multiplicity of actual prescription powers, and perfect correction powers and adjustment factor data on the basis of which an examiner determined the actual prescription power in the past are stored. In estimating a prescription power by making adjustments to a correction power in relation to a perfect correction power on the basis of adjustment factor data, a correction amount used in making the adjustments to correction power is made varied by statistically processing the multiplicity of stored data.

REFERENCES:
patent: 5444504 (1995-08-01), Kobayashi et al.
patent: 5610671 (1997-03-01), Hosoi et al.
patent: 5627612 (1997-05-01), Hayashi
patent: 5662951 (1997-09-01), Greshes
patent: 5715031 (1998-02-01), Roffman et al.

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