Vision and Aviation Quiz

What part of the eye is responsible for detecting light and forming an image?

• Iris

• Lens

• Retina

• Cornea

Which cells in the retina are responsible for night vision?

• Cones

• Rods

• Fovea

• Pupil

Why is it harder to see colours at night?

• The iris closes in the dark

• Rod cells don’t detect colour

• The lens becomes blurry

• Pupils shrink at night

What is the blind spot of the eye?

• The centre of night vision

• The point where the optic nerve exits the eye

• The pupil when fully dilated

• The area of highest clarity

The best method for scanning for traffic during flight is to:

• Stare straight ahead

• Use long, sweeping glances

• Use short, regular eye movements in small sections

• Close one eye and focus with the other

What visual illusion may occur when flying over water or featureless terrain at night?

• Somatogravic illusion

• False horizon

• Black hole effect

• Vection

The illusion that makes a pilot think they are higher than they actually are when approaching a runway narrower than usual is called:

• False slope

• Upslope illusion

• Narrow runway illusion

• Auto-kinetic illusion

A sloping runway can cause what type of visual illusion?

• False colour vision

• Illusion of incorrect height

• Tunnel vision

• Flicker vertigo

A down-sloping runway may give the illusion that the aircraft is:

• Higher than it really is

• Lower than it really is

• Travelling faster

• At the correct height

When transitioning from bright to dark environments, full night vision can take up to:

• 30 seconds

• 2 minutes

• 5 minutes

• 30 minutes