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1.发明专利Refrax measuring method and apparatus for measuring degree of eye sight abnormality, especially, astigmia 失效用于测量眼睛异常程度的特别测量方法和装置，特别是ASTIGMIA
公开(公告)号：JPS59218138A
公开(公告)日：1984-12-08
申请号：JP10162684
申请日：1984-05-18
Applicant: Essilor Int
Inventor： JIYAN KUROODO HATSUSHIYU , MIREEYU SERUBAN
CPC classification number: A61B3/12 , A61B3/1035
Abstract: The invention concerns a process and device for measuring the degree of ametropia of an eye. The rays of a luminous source passes through a focussing lens and a test lens in order to create an image on the retina. The rays issuing from the source or from the image pass through a black optical slit and are reflected by at least one reflecting surface defined in a revolving screen driven in rotation by a motor. Application to refractometric instruments for measuring the degree of ametropia of the eye.
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