The Eye Flashcards
Sclera
whites of the eye. protects.
Choroid
inferior to sclera. supplys blood to retina
Retina
inner layer of eyeball. turns light into action potential. contains speacialised sensory cells (rods and cones) send info to brain via optic nerve
Iris
Coloured part of the eye
two muscles control shape of pupil
Pupil
Hole
Cornea
transparent, refracts light towards pupil.
no blood vessels
Ciliary Body
changed shape of lens, eleastic
Lens
jelly-like structure. can change shape to refracts light to converge.
Aqueous Humour
fluid nourishses lens & cornea
Vitrenous Humour
jelly-like fluid makes up 2/3 of eye
gives eye shape & distance for lens to work
Optic Disc
Blind spot - where optic nerve leaves te eye. no photorecptord