Vision And Visual Perception Flashcards
What is the black hole phenomenon?
A. loss of colour vision in low-light conditions.
B. a reduction in height perception in low-light conditions.
C. a crater formed at the impact site of a crash scene.
D. the unexplained vanishing of an aircraft from radar screens.
B. a reduction in height perception in low-light conditions
Which of the following statements about the retina is FALSE?
A. It is made up only of cones.
B. It consists of multiple layers.
C. It is sensitive to oxygen deprivation.
D. Visual images are projected onto it upside-down.
A. It is made up only of cones
_____ vision is dependent upon the cones.
A. Double.
B. Black-and-white.
C. Colour.
D. Night.
C. Colour
If you are long-sighted, you have good __________ vision, and you need __________ corrective lenses.
A. short, concave.
B. long, convex.
C. long, concave.
D. short, convex.
B. long, convex
What type of eye movements is ideal during visual scanning?
A. small, frequent.
B. large, frequent.
C. small, infrequent.
D. large, infrequent.
A. small, frequent
Which of the following statements is TRUE of visual illusions?
A. They are caused by improper scanning or failure to scan.
B. They rarely occur when flying.
C. They are only minor annoyances.
D. They can have the same effect on more than one person.
D. They can have the same effect on more than one person
A pilot has leveled off in an aircraft and is cruising peacefully through the sky. Suddenly, another plane passes him before he can even figure out what happened. How COULD this happen?
A. break-off phenomenon.
B. black hole effect.
C. empty-field myopia.
D. blind spot.
C. empty-field myopia
Which of the following is a common error when flying an approach on a short runway?
A. flying the approach as usual.
B. flying too low.
C. flying too high.
D. landing short.
C. flying too high
Vision is sharpest within _____ degrees of the fovea.
A. 20.
B. 1-2.
C. 25.
D. 5.
A. 20
Which of the following statements about visual illusions is TRUE?
A. They almost always occur when viewing a runway.
B. They are caused by the brain’s ability to make comparisons.
C. They rarely occur over 10,000 ft AMSL.
D. Pilots must be aware of possible illusions in order to defeat them.
D. Pilots must be aware of possible illusions in order to defeat them
Which of the following statements about the eyes is TRUE?
A. Sharp vision is dependent on rods in the fovea.
B. The retina completely covers the back of the eye.
C. Vision is sharpest when looking straight ahead.
D. Peripheral vision is sharpest.
C. Vision is sharpest when looking straight ahead
When is the break-off phenomenon MOST likely to occur?
A. when few visual stimuli are present.
B. flying low under a bright sun.
C. after recovering from hypoxia.
D. when the natural focal length of the eyes shortens to approximately 3-4m.
A. when few visual stimuli are present
In which part of the eye does the majority of light refraction occur?
A. lens.
B. iris.
C. cornea.
D. fovea.
C. cornea
Which of the following statements is TRUE of night vision?
A. It is a blind spot that occurs in the central vision at night.
B. Is enabled by the rods.
C. Mild hypoxia does not have any effect on it.
D. It is the same as cone vision.
B. Is enabled by the rods
Which of the following statements about the retina is TRUE?
A. It is sensitive to oxygen deprivation.
B. It covers 100% of the back of the eye.
C. It covers the front of the eye.
D. It is not sensitive to light.
A. It is sensitive to oxygen deprivation