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SELF GUIDED SUBJECTIVE REFRACTION INSTRUMENTS AND METHODS
专利权人:
发明人:
申请号:
EP11841072.9
公开号:
EP2640256A1
申请日:
2011.11.16
申请国别(地区):
EP
年份:
2013
代理人:
摘要:
A refraction device determines a refraction end point to provide corrective optics for a test subject. The device includes an adjustable optical system providing corrective optics to the test subject and an adjustable viewing target disposed along an optical path such as to be viewable through the adjustable optical system by a test subject. The adjustable viewing target includes a directional indicator linked synchronously to at least two choices of corrective optics presented to the test subject.
来源网站:
中国工程科技知识中心
来源网址:
http://www.ckcest.cn/home/

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