The Structure Of The Eye Flashcards
Pupil
The hole in the iris that light passes through to reach the retina
Iris
Makes the pupil large when light is dim, small when light is bright. (It’s a muscle)
Muscles
Allows the eye to move which provides vision in various directions
Fat
Later surrounding the eyeball which cushions and protects it from damage
Optic nerve
Carries nerve signals to the brain. Tube like structure in the back of the eyeball
Sclera
The tough cover of the eyeball that forms the “white” of the eye (protects the eye)
Choroid
A layer found between the sclera and the retina that contains may blood vessels which bring nutrients and oxygen to the eye and remove waste
Retina
The area where the image is produced and converted into nerve signals. Inside layer structure inside the back area of the eye
Vitreous Humour
A jelly like fluid found in the centre of the eye which helps maintain the eye’s shape and plays a small role in focusing light on the retina
Lens
Helps focus light in the retina. Behind the iris
Cornea
Helps focus light on the retina. Outside layer in front of the iris
Aqueous humour
A watery fluid found between the cornea and iris which maintains the shape of the front of the eye and plays a small role in focusing light
Blind spot
The area where the optic nerve and blood vessels connect to the retina, there are no rods or cones
Ciliary muscles
Control the thickness of the lens, to adjust for near and far objects
Suspensory legaments
Attach the ciliary muscles to the lens which allow the lens to change shape and focus light on the retina
