A person can see objects clearly from a distance 10cm to infinity.Then we can say that the person is

We can see object due to

Man can see objects equally clear from various distances due to

A far sighted person cannot see object clearly al a distance less than 75 cm from his eyes. The power of the lens needed to read an object al 25 cm is

If a person can sees clearly at a distance of 100 cm, then find the power of leris used to see object at 40 cm.

A person can not see the objects clearly placed at a distance more than 40 cm . He is advised to use a lens of power

A person can see object clearly only upto a maximum distance of 50 cm. Hi eye defect, nature of the corrective lens and its focal length are respectively

A person cannot see objects clearly beyond 125 cm. The power of the lens to correct the vision is