There are hundreds of new apps released every week, 10,000+ users downloaded Vision protection latest version on 9Apps for free every week! The App has powerful functions. This hot app was released on 2013-07-30. If you still need more information collecting extra factors, read below.
Eye care vision chart principle: It makes use of psychological principles of space perception, so that a 2dimensional figure can be viewed as a 3dimensional extension. Prolonged visual exposure to close objects causes visual fatigue. It is recommended to gaze at the chart for 25 seconds to relief visual fatigue.Soft green desktop background color is recommended by ophthalmologist to effectively alleviate eye fatigue.For android system version 2.2 or above , you can install this application to SD cardApp 2 SD, APP2SD, APP TO SD .
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