Measuring method for measuring rotation characteristic of eyeball of subject and setting method for progressive power lens

Abstract

A measuring method for measuring rotation characteristics of an eyeball of a subject includes: showing display information on a display screen, at a position separated from a reference position, the display screen being shown in front of the eyeball of the subject by a display device that is secured to a head of the subject, the reference position being where a front line of sight of the eyeball of the subject who looks forward straightly, crosses the display screen; changing a direction of a line of sight from the eyeball to the display information by switching the display information to other contents while changing a displayed position of the display information; and judging whether the subject can recognize the contents of the display information at the changed position, to measure the rotation characteristics of the eyeball.

Dependencies are inferred from the claim text.