To provide an eye refractivity measuring instrument capable of measuring the refractivity of an eye to be examined inclusive of the degree of astigma and an astigmatic axis with a simple constitution.
The eye refractivity measuring instrument 1 is equipped with a target light projection system 10 for projecting target light on the eyeground of an eye to be examined and a light detection system 20 for detecting the reflected light from the eyeground of the eye to be examined of the target light. The light detection system 20 is characterized by being equipped with a moving lens 14 constituted so as to be movable in an optical axis direction, a beam splitter 15 for splitting reflected light, a light detection element 16 arranged on the side of a focusing position CG of target light in order to detect one of split reflected lights and a light detection element arranged behind the focusing position CG of target light in order to detect the other one of split reflected lights.
| JPH10307314 | OBSERVATION OPTICAL DEVICE |
| JP5665181 | Tear layer measurement |
| WO/2018/071310 | SYSTEM FOR TEMPORARY NONPHARMACOLOGIC CONSTRICTION OF THE PUPIL FOR IMPROVING VISION |
NARUMI TATSUYA
TANIGUCHI ICHIRO
MIYAZAKI TOMOYUKI
SAITO OSAMU
YASHIMA TAKESHI
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