Patent ID: 11960149
Assignee: HOYA LENS THAILAND LTD.
Field: Optics (Instruments)
Classification: CPC G  A | IPC G

Claim 0:
1. A method for measuring visual behavior of a subject to design an eyeglass lens, the method comprising:
a step (a) of ascertaining a head rotation amount that is generated by the subject in a sagittal plane of the subject when gazing at each of a plurality of gaze points that are set at predetermined and known distances different from each other in a forward depth direction with respect to the subject; and
a step (b) of determining an eyeball rotation amount that is generated by the subject when gazing at each of the plurality of gaze points, based on an assumption that a line-of-sight angle from the subject's eyes to the plurality of gaze points when the subject is gazing at each of the plurality of gaze points is equal to a sum of the head rotation amount and the eyeball rotation amount,
wherein the number of gaze points is at least three.