Draw a labelled diagram of human eye and explain the terms :far point ,Power of accommodation , persistence of vision and the least distance of distinct vision for a human eye.

Explanation

(a) For diagram,
(b) Far point : The point at maximum distance upto which an eye can see clearly and distinctly is called far point.
(c ) Power of accommodation : The property of human eye by which it can see clearly and distinctly nearby as well as distant objects.
(d) Persistence of vision : The property of human eye by which mage of object remains on the retina even after the removal of object in from the sight is called persistence of vision.
(e ) Least distance of distinct vision : The minimum distance from eye upto which it can see clearly and distinctly is known as least distance of distinct vision.