Q. What is the minimum distance for clear vision for healthy eyes?
Solution:
- The minimum distance of clear vision for a normal healthy eye of a human being is supposed to be 25 cm.
- If an object is placed at a distance less than this, from the eye, it will not be seen distinctly.
- Therefore, for a normal eye, in case of an adult, the least distance of distinct vision is 20 to 25 cm.
- Clear vision in the normal eye results from light rays passing through the cornea, pupil and lens, and focusing directly on the retina.
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