Perimeter

Details Perimeter Perimeter

2008-05-27

2008-05-27

Dang, Hung (Department: 2873)

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

Reexamination Certificate

active

11141330

ABSTRACT:
A perimeter for examining a state of a visual field of a patient's eye includes: a target presenting unit that presents a stimulation target for examination to the eye, a presentation position and a presentation brightness of the target being variable; a first arithmetic unit that obtains a threshold of sensitivity with respect to the presentation brightness at each examination point on a retina corresponding to each presentation position; an input unit that inputs function information at each examination point, the function information at each examination point being objectively obtained by processing a first fundus image of the eye taken before irradiation onto a fundus of the eye and a second fundus image of the eye taken after the irradiation; and a determining unit that determines an initial reference value of the presentation brightness at each presentation position based on the input function information at each examination point.

REFERENCES:
patent: 5037194 (1991-08-01), Kohayakawa et al.
patent: 5323194 (1994-06-01), Campbell et al.
patent: 6406437 (2002-06-01), Zur et al.
patent: 6478424 (2002-11-01), Grinvald et al.
patent: 6705726 (2004-03-01), Tanassi et al.

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