Question

calculate the focal length of the eye lens when the object is an infinity at the distance of 25cm from our eye.

Answer 1

That is, the focal length of thelens is negative. The near point of the eye is the point nearest theeye at which an object can be placed and still have a sharp image produced on the retina. For a normal eye, the near point is located 25cm from the eye. The reason for this is that their eye lens cannot fully con