Good app
Good app does what it says it will.
To Kotchy - Get your facts straight, you CAN have better than normal (20/20) vision. The 1st number is how far away the person stood from a full size chart. The 2nd number is how far away a person with normal vision could stand from the full size chart & still read the same row of letters. Therefore, a person with 20/15 vision can read at 20 feet what a person with normal vision can only read at 15 feet, thus better than "normal" vision. Note that each eye can also have different results.
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EyeChart - Vision Screening