function of eye
AQUEOUS HUMOUR- The fluid under pressure in the front of the eye to keep it in shape.
VITREOUS HUMOUR- the gelatenious fluid under pressure at the back of the eye to keep it in shape.
CORNEA- refracts light rays as they enter the eye.
PUPIL- the gap in the centre of the iris, allowing light to pass through lens.
IRIS- coloured part of the eye that controls size of pupil.
LENS- controls fine focussing of light rays.
CILIARY MUSCLES- controls diameter of th ring of suspensory ligaments, therefore the diameter of lens.
SUSPENSORY LIGAMENT- holds lens in position and enables any outward pull to change lens shape.
CHOROID- area coloured black by melanin, which absorbs light and prevents it being reflected inside eye.
OPTIC NERVE- bundle of nerve fibres carring action potential to brain.