| 摘要 |
PURPOSE: A visual acuity examination device is provided to measure vision by using rotators. CONSTITUTION: A fixing unit(110) is vertically installed on the ground. The fixing unit includes a supporting member(112), a shaft(114), and a fixing member(116). A rotating unit(210) is rotatably installed to the fixing unit. The rotating unit includes rotators(212) which have polygonal shapes and print surfaces(212b).
|
