Question

Why we cannot see the objects which are placed very Close to our eyes?

Answer 1

If an object is placed very close to the eyes the light reflected from it does not fall on the retina. It either falls in front of the retina or behind it or on the blindspot. Hence, we cannot see the object. The minimum distance for seeing an object clearly is 25cm.

Answer 2

we can see it but not clearly as our eye starts paining if we look continously toward a perticular object