Question

19. 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

Answer 1

Explanation:

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. 5 cm. 2.5 cm.

Answer 2

Answer:

Given p1 = 40 D, and P2 = 20 D

We have Peff = 40D +20D = 60 D

=> f=100/peff=100/60

= 1.67 cm

Therefore the distance estimated is 1.67 cm