Short sightedness and correction
A man can see clearly only objects which lie between 0.50m and 0.18m from his eye.
1) what is the power of the lens which when placed close to the eye would enable him to see distant objects clearly?
2) Calculate his least distance of distinct vision when using this lens.
for 1) object distance, u, would be 0.5 and image distance, v, would be 0.18? the answer is supposed to be 2D, where D is the least distance of distinct vision (i think)
for 2) i'm lost
thanks
