Eye test chart apparatus

Details Eye test chart apparatus Eye test chart apparatus

2008-04-15

2008-04-15

Hasan, M. (Department: 2873)

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

Reexamination Certificate

active

10487784

ABSTRACT:
An eye test chart includes a visual target for multiple test purposes composed of patterns of combinations of at lest two or more kinds of colors and predetermined shapes that are arranged at predetermined positions on an image area corresponding to visual field regions to be examined. Color vision defects and their abnormal regions can be identified as a result of a subject's visual identification of the visual targets arranged at the predetermined positions.

REFERENCES:
patent: 5844544 (1998-12-01), Kahn et al.
patent: 6379007 (2002-04-01), Farb
patent: 61-0144516 (1986-07-01), None
patent: 04-014972 (1989-06-01), None
patent: 01-036483 (1989-11-01), None
patent: 02-029325 (1990-06-01), None
patent: 04-012730 (1992-01-01), None
patent: 05-168593 (1993-07-01), None
patent: 05-088501 (1993-12-01), None
patent: 06-237895 (1994-08-01), None
patent: 11-009550 (1999-01-01), None
patent: 11-032991 (1999-02-01), None
International Search Report for PCT/JP02/08510 mailed on Nov. 26, 2002.

Affiliated with

Also associated with

Rating

Eye test chart apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Eye test chart apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Eye test chart apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3924847