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WorksheetsHPL06
Total questions: 25
Worksheet time: 15mins
Name
Class
Date
1.
Generally, the time required for dark adaptation is..
a)
10 min.
b)
1/10 sec.
c)
10 sec.
d)
30 min.
2.
Accommodation is the...
a)
ability of the eye to alter its focal length.
b)
capacity of the eye to resolve detail.
c)
bending of light when it moves from one medium into another.
d)
perception by the brain from nerve inputs originating in the fovea.
3.
Empty field myopia is caused by…
a)
a lack of distant focal points.
b)
ozone at altitude.
c)
atmospheric perspective.
d)
flying over mountainous terrain.
4.
What illusion can you expect when landing on a larger runway than you are used to?
a)
You flare too low.
b)
You flare too high.
c)
You land short.
d)
You undershoot the runway.
5.
Presbyopia..
a)
is partial visual loss due to pressure changes in the eye.
b)
is common over the age of 50.
c)
is caused by long-termed exposure to stimuli over 90 dB.
d)
is usually treated by surgical replacement of the lens and is compatible with flying.
6.
When the optical image forms in front of the retina the person is considered to be..
a)
unable to focus on near objects.
b)
suffering from cataracts.
c)
long-sighted.
d)
short-sighted.
7.
Which of the following options is one of the difference between cones and rods in the eye?
a)
Most of the rods are in the fovea and most cones are in the outside area.
b)
Rods have high visual acuity while cones observe colours.
c)
Cones are more sensitive to colours than rods.
d)
Cones are more sensitive to light than rods.
8.
How can a pilot prevent Empty Field Myopia?
a)
By maintaining a constant instrument scan and trusting the indications.
b)
By wearing their corrective lenses.
c)
By scanning the sky for other aircraft.
d)
By deliberately focusing on a distant object such as a cloud edge or a wingtip.
9.
One illusion that pilots experience in conditions of fog or mist are that objects appear to be..
a)
closer than they really are and this can lead to shallow approaches.
b)
further away than they really are and this can lead to shallow approaches.
c)
closer than they really are and this can lead to steep approaches.
d)
further away than they really are and this can lead to steep approaches.
10.
Compared with day operations, what differences should a pilot adopt when seeking to identify a possible collision threat at night?
a)
Spend twice as much time with the eyes remaining still during each saccade of the lookout scan.
b)
Move the eyes in small arcs to induce a moving image on the retina for the rods to identify.
c)
Focus on the instrument panel to allow the rods to identify objects outside.
d)
Cover one eye to avoid being affected by the “blind spot”.
11.
During a night flight at 10000 feet you notice that your visual acuity has decreased. In this case you can increase your acuity by..
a)
closing one eye.
b)
dimming the instrument lights.
c)
scanning sectors of the field of vision.
d)
breathing supplementary oxygen.
12.
Glaucoma is caused by..
a)
disturbed adaptation.
b)
disturbed night vision.
c)
disturbed colour vision.
d)
high pressure in the eye.
13.
An upsloping runway makes the pilot...
a)
Establish a higher than normal approach speed.
b)
Think he’s too high, leading him/her to land long.
c)
Think he’s too high, leading him/her to land short.
d)
Think he’s too low, leading to a steep approach landing long.
14.
A pilot visits the optometrist and complains that he can’t see pictures during the classes. The optometrist researches the pilot’s eye and finds out his cornea is not evenly shaped. What is the pilot suffering from?
a)
Short sightedness.
b)
Long sightedness.
c)
Astigmatism.
d)
Presbyopia.
15.
Complete the following phrase: During a medical revalidation, the pilot is informed that he/she is totally blind in one eye. This is referred to as (1) _____, and he/she (2)_____ be assessed as fit to fly under these circumstances.
a)
Binocularity; (2) may
b)
Binocularity; (2) cannot
c)
(1) Monocularity; (2) may
d)
Monocularity; (2) cannot
16.
Glaucoma is due to..
a)
a drop in pressure of the liquid around the eye.
b)
excess light on the eyeball.
c)
damage to the eyeball due to high altitude.
d)
an increase in pressure of the liquid within the eye.
17.
Which of the following problems can be caused by wearing contact lenses?
a)
A reduction in colour vision, especially at high altitudes.
b)
Poor peripheral vision and occasional misting.
c)
The lenses may become dislodged when the humidity is too high.
d)
Increased corneal damage due to mild hypoxia and dehydration.
18.
Name the most important parts of the eye in the order they are met by the light entering the eye, until it reaches the visual cortex.
a)
Cornea, lens, iris and pupil, retina.
b)
Lens, iris and pupil, cornea, retina.
c)
Cornea, iris and pupil, lens, retina.
d)
Lens, iris and pupil, retina, cornea.
19.
Are contact lenses considered to be an acceptable means of visual correction for pilots?
a)
Yes.
b)
No.
c)
Only when near-sighted.
d)
Only when far-sighted.
20.
When does the blind spot on the retina become significant for a pilot?
a)
If another aircraft is on a converging course and the pilot's field of view is restricted on one side, the pilot might fail to see the other aircraft if it is positioned in the blind spot of the unobstructed eye.
b)
When an aircraft is approaching from head-on, it will disappear for a moment as it passes the blind spot on the retina. It will remain undetected until the relative position of the aircraft changes.
c)
If the pilot's vision is unrestricted and is focused directly ahead, in conditions of low forward visibility, the aircraft converging its track may go undetected if it falls in the blind spot of the eye.
d)
When flying in conditions of low forward visibility, the existence of the blind spot on the retina of each eye can make the judgement of the distance of other traffic more difficult for the pilot.
21.
What causes colour blindness?
a)
Absence of a certain group of cones.
b)
Absence of a certain group of rods.
c)
Too low acuity.
d)
The cones and rods are placed in a random order.
22.
Which of the following may reduce the likelihood of empty field myopia?
a)
Avoid low flying over featureless terrain or water.
b)
Scan for aircraft using peripheral vision.
c)
Try to fix your gaze on the horizon.
d)
One should concentrate only on the instruments.
23.
If you are subjected to an illusion during night flying you should..
a)
use your oxygen mask.
b)
scan the surroundings.
c)
continue on instruments.
d)
dim the cockpit lighting.
24.
When flying in gradually deteriorating visual conditions, what strategy will help the pilot to avoid spatial disorientation?
a)
Reduce environmental factors such as stress and distractions.
b)
Rely increasingly on the indications of the flight instruments.
c)
Keep head and eye movements to a minimum.
d)
Trust the body’s kinaesthetic sense of movement.
25.
The "Black hole" phenomenon occurs during approaches at night and over water, jungle or desert. When the pilot is lacking visual cues other than those of the aerodrome there is an illusion of..
a)
climbing.
b)
being too close, landing long.
c)
being too low, flying a steeper approach than normal.
d)
being too high and too far away, dropping low and landing short.
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