Parts of the eye

Sides and back of sclera

Protects and supports the eyeball

Cornea

Bends the light rays into the eye

Sides and back of choroid

Absorbs scattered light and contains blood vessels

Iris

Regulates the amount of light that enters the eye

Pupil

The opening for light to enter the inner eye

Ciliary muscle

Changes the shape of the lens in order to focus

Rods

Photoreceptors that are sensitive to dim light

Cones

Photoreceptors that are sensitive to different wavelengths of light (colour vision)

Fovea centralis

Contains a high density of cones, and provides acute vision

Lens

Focusses light rays onto the fovea centralis

Humours

Support the eyeball, with pressure of the fluids that they contain

Optic nerve

Transmits sensory information to the brain