Structure and Function of the eye

What part of the eye protects the eyeball?

• Sclera

• Pupil

• Iris

• Retina

What two parts of the eye does the choroid lie between?

• Iris and retina

• Pupil and sclera

• Retina and sclera

• Lens and pupil

What best describes the Pupil?

• It contains blood vessels

• It is a black dot at the centre of the eye

• It transmits and focuses ligh

• It can become thicker or thinner

What is the function of the Iris?

• It contains blood vessels

• It sends signals to the brain

• It regulates the amount of light that enters the eye

• It decreases and increases in size

What is the function of the Cornea?

• Transmits and focuses light to make clear images

• It regulates the amount of light that enters the eye

• It is an opening through which light can enter the eye

• It nourishes the retina

What is the Lens made up of?

• Blood vessels

• A white protective layer

• A solid substance

• A jelly like substance which is made up of protein

What are the two types of photoreceptors called in the Retina?

• Cones and Spikes

• Pins and Needles

• Rods and Squares

• Rods and Cones

The Rods process........

• Black and white

• Colour

• Black and green

• Red and green

The Cones process.......

• White and red

• Red and green

• Black and white

• Colour

Electrical impulses are formed by........

• The Choroid

• The Retina

• The Lens

• The Sclera