OCULAR IMAGE CAPTURING DEVICE

Abstract

An ocular image capturing device comprising: an ocular image generating module operable to generate an image of a subject's eye based on light reflected from the eye; a determination module arranged to determine whether or not a ratio of a number of pixels representing at least a portion of a pupil region (302) of a predetermined permissible polygonal region (314) of the generated image (310) to a total number of pixels of the predetermined permissible polygonal region (314) of the generated image is greater than a predetermined threshold value, and to generate an output signal that is indicative of the determination, the pupil region (302) being an image of at least a portion of the pupil of the eye; a fixation target display module arranged to display a fixation target for fixing the gaze of the subject's eye; and a fixation target display controller arranged to control at least one characteristic of the displayed fixation target based on the output signal generated by the determination module.

Inventors

ANDERSON, ALAN
ASHOK, Praveen
FUJIWARA, TOMOHARU
TANABE, YASUSHI
KINTOU, HIROSHI
HIROKAWA, Mariko
UMEZAKI, Tadashi

Assignees

Optos plc

Dates

Publication Date: 20260513
Application Date: 20171010