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20 September, 13:26

If you have normal vision, your eyes are not covered, and you are in a well-lit area, then opening your eyes is a necessary and sufficient condition for seeing.

True or False?

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  1. 20 September, 13:34
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    true

    Explanation:

    When your eyes are not covered and you are in an area with good lighting, then opening your eyes would certainly be a necessary thing to do to be able to see and this makes your vision to be normal.

    According to Leo Gross, you can have a normal vision if you are 20 feet away from a particular spot and you see what a normal person sees on that same spot. There is the Snellen chart one is also expected to read in that position, so maintaining a normal vision means someone has 20/20 vision.
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