The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 27, 1999
Filed:
Jul. 02, 1997
Nidek Co., Ltd., Aichi, JP;
Abstract
The invention relates to an optometric apparatus which is capable of easily confirming the appearance of a target for near use in a state of correction for far use. An optometric apparatus for subjectively examining a visual function of an eye to be examined includes: a pair of left and right optical units having test windows in which corrective optical systems having various optical characteristics are selectively disposed; a flapping mechanism for flapping the optical units; a target presenting mechanism for presenting a target for near use for measuring an addition power of the eye to be examined; a mode changeover mechanism for changing over a mode to an addition power mode; a input mechanism for inputting elimination and imparting of a refractive power of an addition power portion during the addition power mode; and a control mechanism for providing control such that the refractive power of the addition power portion is eliminated and imparted while a flapped state is being maintained, on the basis of an input by the input mechanism.