eye

• cornea - transparent layer of the eye that refracts light to focus it on the retina
• iris - controls how much light enter the eye
• lens - transparent disc which can change shape to focus light onto retina
• retina - light sensitive layer of the eye that contains receptors for light intensity and color (rods & cones)
• optic nerve - carries impulses from the retina to the brain
• pupil - hole allowing light to enter eye
• ciliary muscle - ring of muscle that contracts and relaxes to change shape of lens
• sclera - strong outer wall of eyeball which helps to keep eye in shape + provides place of attachment for muscles which move the eye
• suspensory ligaments - ligaments connecting ciliary muscle to lens
• fovea - region of retina with highest density of cones where eye sees very good detail
• aqueous humour - fluid in the eye between cornea and lens which helps to maintain the shape of the eye
• vitreous humour - transparent gel-like substance that fills the eyeball
• choroid - pigmented layer of tissue lining inside sclera which prevents light reflecting inside eyeball
• blind spot - point at which optic nerve leaves the eye, where there are no receptor cells