ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,521,009, issued on Jan. 13, was assigned to NINGBO FLO OPTICAL TECHNOLOGY DEVELOPMENT Co. LTD. (Ningbo, China).
"Vision detection apparatus and method" was invented by Yibing Liu (Ningbo, China), Zhao Sun (Ningbo, China), Liwei Liu (Ningbo, China) and Chao Li (Ningbo, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A vision detection apparatus is provided which comprises an eye lens, and the followings which are juxtaposed, with the eye lens as a common component: an ocular axial length measurement light path for measuring an ocular axial length of a detected eye; a diopter detection light path for obtaining refractive error information of the test...