Parts of the eye

The lens

• allows light to enter the eye

• focuses the light

• Sends a signal to the brain

The retina

• Has cones and rods

• Sends the image to the optic nerve

• Is at the back of the eye

_____ perceive black and white

_____ percieve colour

The optic nerve

• sends an electrical signal to the brain

• Is connected to our spine

• Can get tangled, resulting in vision problems

The sclera

• Is inside the iris

• is the white part of the eye

• is a tough protective covering

The ____ is the coloured part of the eye

The pupil ______ when there is too much light in the surrounding

• expands

• contracts

• no change happens

Ciliary muscles

• Changes the shape of the iris to let in light

• changes the shape of the lens to help it focus

• Changes the shape of the pupil to let in light

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