Patent ID: 7267439

Claim:
An optometric apparatus for performing an eye examination using a computer screen, comprising: a subject attribute acquisition unit for acquiring an attribute of a subject; an astigmatic axis determination chart display unit for displaying an astigmatic axis determination chart on the computer screen; an orientation acquisition unit for acquiring an orientation selected by the subject on the astigmatic axis determination chart displayed on the computer screen; a first vision measurement chart display unit for displaying on the computer screen a vision measurement chart having the acquired orientation; a first visual recognition limit acquisition unit for acquiring a visual recognition limit selected by the subject on the first vision measurement chart displayed on the computer screen; a second vision measurement chart display unit for displaying on the computer screen a vision measurement chart having an orientation perpendicular to the acquired orientation; a second visual recognition limit acquisition unit for acquiring a visual recognition limit selected by the subject on the second vision measurement chart displayed on the computer screen; a far point distance calculation unit for employing the acquired first visual recognition limit, the acquired second visual recognition limit, and the acquired subject attribute as entry parameters to calculate a first far point distance and a second far point distance; and a power calculation unit for calculating a refractive power based on the acquired orientation and the calculated first and second far point distances.