Question

What is the value of the near point distance \[D\] used for comfortable viewing?

Options

• \[D \cong 250\ \text{cm}\]

• \[D \cong 25\ \text{cm}\]

• \[D \cong 25\ \text{m}\]

• \[D \cong 2.5\ \text{cm}\]

Answer 1

The near point distance is \[D \cong 25\ \text{cm}\]. This is the closest comfortable distance at which an image can be viewed, though viewing at this distance causes some strain on the eye.