Eye Structure

What is true about cornea from our eyeballs?

• Transparent layer which refracts and focuses light onto the retina.

• The coloured part of the eye which controls the size of the pupil.

• Transparent membrane which protects the front part of the sclera.

• Strong fibres which hold the eye lens in its position.

What is true about choroid from our eyeballs?

• Layer containing photoreceptors which detect light and produces nerve impulses.

• Black layer that prevents refraction of light in the eye and supplies oxygen and nutrients to the eye.

• Nerve fibres which carry nerve impulses.

• Strong layer that maintains the shape of the eye and protects it.

Which of the following characteristics of retina is incorrect?

• has 2 types of photoreceptors, rod cells and cone cells.

• has an even distribution of photoreceptors across the layer.

• has a blind spot with no photoreceptors.

• has sensory neurones attaching to photoreceptors.

Name structure A

• Pupil

• Iris

• Cornea

• Retina

Name Structure B

• Lens

• Pupil

• Sclera

• Cornea

Name structure G

• Lens

• Pupil

• Optic Nerve

• Ciliary Muscles

What structure is responsible for carrying sensory impulses from the eye to the brain?

• Retina

• Iris

• Optic Nerve

• Rod cells & Cone cells

What will happen to your pupils if you are in a really bright room?

• They will contract

• They will expand

• They will burst into flames

• They will stay the same size

What structure of the eye controls the size of the pupils?

• Ciliary Muscles

• Iris

• Lens

• Retina

What is the function of the Lens?

• Lining of the back of the eye that contains light receptor cells.

• Regulates how much light enters the eye

• Tough, transparent, protective coating that bends light as it enters the eye

• Focuses light onto the retina