IGCSE The Eye

Identify the structure that refracts light as it enters the eye

• Fovea

• Cornea

• Iris

• Lens

State the light sensitive tissue found in the eye

Which structure contains two types of muscle and controls how much light can enter the eye?

• Iris

• Pupil

• Sclera

• Lens

Identify the receptor that is sensitive to red, green and blue light

• Rod cell

• Thermoreceptor

• Mechanoreceptor

• Cone cell

Which structure is a circular opening that lets light into the eye?

• Retina

• Blind spot

• Pupil

• Iris

Identify the region at the back of the eye where there are no photoreceptors

Which structures can adjust in shape to focus light on the retina?

• Iris

• Lens

• Cornea

• Pupil

#1 Refers to the clear tissue that covers the front of the eye

• Retina

• Cornea

• Pupil

• Iris

#2 refers to

• optic nerve

• cornea

• iris

• pupil

#7 Refers to the part of the eye that carried visual information from the eyeball to the brain

• lens

• optic nerve

• retina

• sclera