Light → Cornea → Aqueous humour → Pupil → Lens → Vitreous humour → Retina → Stimulus → Optic nerve → Cerebrum → Sense of sight
Binocular vision: The images from two sides of the same object are formed in the left and right eye. These two images are combined-together in the visual area of our brain to form a three-dimensional image of the object. This is called binocular vision.
Food habits and health of the eyes: The pigment present in photoreceptors is derived from vitamin A. The deficiency of vitamin A results in the low production of retinal. This inturn creates the deficiency of rhodopsin in rod cells. The resynthesis of rhodopsin also get blocked. This causes night blindness.
Due to prolonged deficiency of vitamin A, the conjunctiva and cornea will become dry and opaque. This causes xerophthalmia and leads ultimately to blindness. Hence it is necessary to include food containing vitamin Ain our diet.
