PHOTORECEPTORS
CONCAVE LENS
CONVEX LENS
REFRACTION
CILIARY BODY
RETINA
CORNEA
CHOROID
VITREOUS HUMOR
AQUEOUS HUMOR
CONJUCTIVA
SCLERA
ELECTROMAGNETIC SPECTRUM
HYPEROPIA
MYOPIA
CATARACTS
RHODOPSINS
COLOUR BLINDNESS
PHOTOPIGMENTS
IRIS
PUPIL
