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The Human Eye and the Colourful World
The least distance of distinct vision for a young adult with normal vision is about
(a) 25 m. (b) 2.5 cm. (c) 25 cm. (d) 2.5 m.
The correct option is (c).
Least distance of distinct vision is the minimum distance, at which an object can be seen clearly without strain. So, to see an object clearly and comfortably it must be held at about 25 cm from the eyes. It is also called the near point of the eye. For a young adult, the least distance of distinct vision is 25 cm.
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