Poor fusion function will affect the duration of keeping clear vision in both eyes, leading to problems such as near-eye soreness, eye swelling or visual fatigue. This inspection is included in the standard optometry inspection items to evaluate whether more detailed visual function inspections are needed .
① The subject sits comfortably behind the comprehensive refractor, dims the indoor light, and puts the distance foot correction diopter and distance interpupillary distance into the refractor.Open both eyes, use red and green filters (comprehensive optometry auxiliary film right eye RL, left eye GL), separate binocular vision, right eye wears red filter, left eye wears green filter.
② Show the Worth-4-dots optotype. At this time, the subject sees 2 red optotypes in his right eye and 3 green optotypes in his left eye. Let its eyes fixate on the visual mark, and tell how many visual marks it sees and their colors.
Post time: Aug-12-2023