Question

Vision is enabled when the impulse from the retina reaches the cerebrum through the optic nerve.

a. Draw a flow chart showing the pathway of light from cornea to retina.

b. There is no vision at the point where the optic nerve starts. Why?

Answer 1

a. Light → Cornea → Aqueous humour → Pupil → Lens Vitreous humour → Retina → Optic nerve

b. Rod cells and cone cells are absent in the part from where the optic nerve begins / Photoreceptors are absent.