range of vision for normal eye
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approximately 1.75 mm is the answer according to me.
dilipvijayram:
A reference value above which visual acuity is considered normal is called 6/6 vision, the USC equivalent of which is 20/20 vision: At 6 meters or 20 feet, a human eye with that performance is able to separate contours that are approximately 1.75 mm apart.
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The least distance of distinct vision for a young adult with normal vision is 25 cm
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