A young boy can adjust the power of his eye lens between 50 D and 60 D. His far point is infinity. A. What is the distance of his retina from the eye-lens? b. What is the near point?

What is the distance between the lens and retina of eye ?

Find the power of the eye lens of the normal eye when it is focussed at its near point. Assume the distance of the retina from the eye lens to be 2.5 cm.

For a normal eye, the cornea of eye provides a converging power of 40 D and the least converging power of the eye lens behind the cornea is 20 D . Using this information, the distance between the retina and the cornea eye lens can be estimated to be

For a normal eye, the cornea of eye provides a converging power of 40 D and the least converging power of the eye lens behind the cornea is 20 D . Using this information, the distance between the retina and the cornea eye lens can be estimated to be

For a normal eye, the cornea of eye provides a converging power of 40 D and the least converging power of the eye lens behind the cornea is 20 D . Using this information, the distance between the retina and the cornea eye lens can be estimated to be

For a normal eye, the cornea of eye provides a converging power of 40 D and the least converging power of the eye lens behind the cornea is 20 D . Using this information, the distance between the retina and the cornea eye lens can be estimated to be

A boy can see the objects distinctly only in between 15 cm and 200 cm from his eyes . What should be the power of the lens (in m^(-1) unit ) he will use to see the objects at infinity distinctly ? What will the least distance of distinct vision of his eyes with spectacles ?