【测验】Science-eye
cornea-refracts the light from entering the eye and helps to focus the light onto the retina
choroid-prevents the reflections of the light in eye(absorbs light), supplies food and oxygen to the eye tissues
iris- controls the size of the pupil
pupil-controls the amount of light entering the eye
eye lens-refracts the light of the eye and focuses the light into the retina
ciliary muscle-changes the thickness of the lens (contracts and relaxes)
suspensory ligaments-hold the eye lens in position
aquaeous and vitreous humour(jelly-like)-maintains the shape of the eye,helps to focus the light
onto the retina
retina-detects light stimulus
optic nerve-sends nerve impulses of the retina to the brain
central fovea(yellow spot)-detects light and produce nerve impulses
conjuctiva-protects the cornea
blind spot-it is a spot where the optic nerve leaves the eyeball
