태블릿 시력표 app for iPhone and iPad

This is a vision chart app for iPad.
iPad itself can be used as a vision chart.
After check distance is set, visual acuity can be checked by reading a vision chart on iPad as far as check distance.
If you swipe the screen upward or downward, the size of eye chart can be changed and if swipe the screen to the left, eye chart can be changed at random.
Quick check is possible because of function of check and shortcut to the visual acuity you want.
You can use optotypes like alphabet, arabic numerals, picture, Landolt ring, tumbling E, etc and crowding option.
It has function of astigmatic chart, red-green chart, W4D, animation for a steady gaze.
It can check accurate visual acuity, available for actual medical treatment because it is manufactured in compliance with international standard.

merit
1. able to check accurate visual acuity by iPad itself
2. unable to memorize eye chart because it can change at random
3. able to check various vision chart
4. able to check quickly by shortcut function
5. convenience like crowding option