What is the far point and near point of the human eye with normal vision?
The far point of the human eye is the farthest point up to which the eye can see objects clearly. For a normal eye, the far point is at infinity.
The near point of the human eye is the minimum distance at which objects can be seen most distinctly without strain. It is also called the least distance of distinct vision. For a young adult with normal vision, the near point is about 25 cm from the eyes. A normal eye can see objects clearly between 25 cm and infinity.
Explanation
The textbook clearly defines both terms. The far point is defined as 'the farthest point upto which the eye can see objects clearly' and is 'infinity for a normal eye.' The near point is defined as 'the minimum distance, at which objects can be seen most distinctly without strain' and is 'about 25 cm' for a young adult with normal vision. This is a direct definition-based question testing the student's understanding of basic terminology related to the human eye.