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It is a common misconception that 20/20 is perfect vision. In reality, having 20/20 visions means that you can see from 20 feet what a normal person can see from 20 feet. 20/15 vision means you can see from 20 feet what a normal person can see from 15 feet.

Perfect vision means that your eyes perform the following processes perfectly:

1. Refraction of light

2. Accommodation of the lens

3. Constriction/dilation of the pupil

4. Convergence of the eye

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Griffin Green

Lvl 10
3y ago

What else can I help you with?