What are the causes of 'Myopia' ?

Explanation

(i) Myopia , also known as short sightedness , occurs due to the lengthening of eye ball.
(ii) Nearby objects can be seen clearly but distant objects cannot be seen clearly.
(iii) The focal length of eye lens is reduced or the distance between eye lens and retina increases.
(iv) Far point will not be infinity and teh far point has come closer.
(v) Due to this, the image of distant objects are formed before the retina.