Sight

Light bounces off the object we are looking at and enters the eye through the...

• Cornea and iris

• Iris and optic nerve

• Cornea and pupil

• Pupil and iris

The coloured part of the eye is called the ...

The (a)   focuses the light at the back of the eye on the​ (b)  

• lens
• retina
• iris
• optic nerve
• pupil
• fovea
• cornea

Nerve receptors in the retina send electrical signals to the brain via the

• fovea

• optic nerve

• retina

• lens

The retina meets the optic nerve at the (a)  

• fovea
• lens
• iris
• cornea
• pupil