Which of the following statement is correct?

When light rays enter the eye, most of the refraction occurs at the

The focal length of the eye lens increases when eye muscles

Draw ray diagrams each showing (i) myopic eye and (ii) hypermetropic eye.

A student sitting at the back of the classroom cannot read clearly the letters written on the blackboard. What advice will a doctor give to her? Draw ray diagram for the correction of this defect.