Question

what is short sightedness is two causes
for development of short sightedness describe with a ray diagram how this defect can be corrected used in spectacles

Answer 1

Near sightedness or myopia is a disease in which we are unable to see things located far away..
It is caused by watching TV for a long time and stressing on a single point without moving or relaxing eyes.
It can be corrected by using concave lens because they diverge the rays a little more so, instead of forming in front of the retina, they form on the retina..
hope it helps