What is hypermetropia? State the two causes. With the help of labelled ray diagram, show
(i) Eye defect
(ii) Correction of Hypermetropia
(a) Draw a labelled diagram of the human eye. Label the following parts on this diagram: Cornea, Iris, Pupil, Ciliary muscles, Eye-lens, Retina, Optic nerve and Blind spot.
(b) What are the functions of the following parts of the eye?
(i) Iris (ii) Eye-lens (iii) Ciliary muscles (iv) Retina (v) Optic nerve
