摘要 |
PROBLEM TO BE SOLVED: To more accurately measure an eyelid position of a person being tested.SOLUTION: This nictitation measuring system 10 for measuring an eyelid position of a person being tested, includes: an illumination device 1 for irradiating light extending from an upper eyelid to a lower eyelid in an eye area E of the person being tested; and an image measuring device 2 having an optical axis Ia on a plane obtained by rotating a plane including a light irradiation optical axis La at a predetermined angle &thetas; about an axis Aalong the light irradiated on the person being tested, acquiring height information based on a position of an optical image of the light on a picked-up image, and measuring the eyelid position based on the height information. |