Q. How can change of size of eyeball be one of the reason for
(i) myopic and (ii) hypermetropic eye?
Compare the size of eyeball with that of a normal eye in each case. How does this,change of size affect the position of image in each case?
Ans. (i) The eye suffering from myopia, has long eyeball than that of normal eye due to which the retina is at a larger distance from the eye lens. This results in the formation of the image in front of the retina.
(ii) The eye suffering from hypermetropia has short eyeball than that of normal eye due to which the retina is at smaller distance from the eye lens. This results in the formation of the image behind the retina.