Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Subjective type
Reexamination Certificate
2006-01-23
2008-08-05
Mack, Ricky L. (Department: 2873)
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Subjective type
C351S240000, C351S241000
Reexamination Certificate
active
07407290
ABSTRACT:
In order to examine a degree of monocular diplopia is easily examined in a quantitative manner, a plurality of circular eye marks are seen from a predetermined examination distance with a single eye of a patient to find a particular eye mark whose double vision images are observed to be circumscribed each other, and a degree of monocular diplopia is determined by a view angle of the relevant circular eye mark. Since the eye mark is formed as a circular pattern, a degree of monocular diplopia can be examined irrespective of an axial direction along which double vision images appear.
REFERENCES:
patent: 4222639 (1980-09-01), Sheedy
patent: 2002/0176051 (2002-11-01), Saladin
Frishauf Holtz Goodman & Chick P.C.
Greece James R
Mack Ricky L.
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