Question

When we try to read a printed page by holding it very close to our eyes, We may see a blurred image and also feel strain in the eyes. Give reason.

Answer 1

Reason for inability to read is written below

Focal length of our eyes is 25 cm. In other words, minimum distance required to read is 25 cm. Decreasing the length to lesser than the given value will cause inability to read.

This happens due to inability of eye lens to change shape. Which in turn hinders formation of image on the retina. Hence, blurred image forms.