Richard James MACKOOL,Richard Jonathan MACKOOL,Brice KALESKI,Robert R. TOWLE,Evan Rittenhouse JONES,Christopher Dean SMITH
申请号：
US16789903
公开号：
US20200178792A1
申请日:
2020.02.13
申请国别(地区):
US
年份:
2020
代理人:
摘要：
A refraction device includes a main body, a spherical power lens coupled to the main body, an astigmatic power lens movably coupled to the main body, and a visual display coupled to the main body and oriented toward an optical pathway extending through the spherical power lens and the astigmatic power lens. The visual display is configured to display an image for testing visual acuity.
