ARMY AEROMEDICAL EXAM:RETAKE WITH VERIFIED ANSWERS( LATEST VERSION )
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Course
ARMY AEROMEDICAL
Institution
ARMY AEROMEDICAL
ARMY AEROMEDICAL EXAM:RETAKE WITH VERIFIED
ANSWERS( LATEST VERSION )
Crater Illusion - CORRECT ANSWERS-During NVG w/IR searchlight directed too far
under the A/C nose will create an illusion of landing in a crater.
Alter Planes of Reference - CORRECT ANSWERS-Is an inaccurate sense of altitude,
...
ARMY AEROMEDICAL EXAM:RETAKE WITH VERIFIED
ANSWERS( LATEST VERSION )
Crater Illusion - CORRECT ANSWERS-During NVG w/IR searchlight directed too far
under the A/C nose will create an illusion of landing in a crater.
Alter Planes of Reference - CORRECT ANSWERS-Is an inaccurate sense of altitude,
attitude or flight path in relation to a large object so great it replaces the horizon as the
plane of reference. Example: Approaching a large mountain might feel the need to climb
even though A/C altitude is adequate.
Reversible Perspective Illusion - CORRECT ANSWERS-Occurs at night when a pilot
perceives another another A/C to be moving away but it is actually approaching. (The
pilot must observe position lights)
Myopia/ Night Myopia - CORRECT ANSWERS-Myopia-(Nearsighted) Caused by an
error in refraction in which the lens of the eye does not focus an image directly on the
retina.
Night Myopia- Blue wavelengths of light prevail in the visible portion of the spectrum.
Myopic individuals viewing the blue-green light may experience blurred vision.
Hyperopia - CORRECT ANSWERS-(Farsighted) Caused by an error in refraction in
which the lens of the eye does not focus an image directly on the retina.
Astigmatism - CORRECT ANSWERS-An unequal curvature of the cornea or lens of the
eye, A ray of light is spread over a diffused area in one meridian.
A normal eye focuses the light
Presbyopia - CORRECT ANSWERS-Normal degrading of the eye (the lens begins to
harden).
other factor that degrade with age:
Dynamic Acuity
Recovery from glare
Function under low illumination
Information processing
Day Blind Spot - CORRECT ANSWERS-It covers an area of 5.5 to 7.5 degrees.
Compensated for by binocular vision. It only causes problems if an individual does not
scan.
What are the 3 types of Vision? - CORRECT ANSWERS-Photopic, Mesopic and
Scotopic
, Photopic Vision - CORRECT ANSWERS-Because of the high-level light condition, rod
cells are bleached out and become less effective.
Occurs during daylight or bright light
Produces sharp image and color vision
Requires use of central vision
Involves the cones only
Mesopic Vision - CORRECT ANSWERS-Is experienced at dawn and dust and under full
moonlight.
Vision is achieved by rods and cones.
Color vision is degraded as light levels decrease.
The most dangerous of all three types of vision.
Should use off-center viewing
Scotopic Vision - CORRECT ANSWERS-Experienced under low-light level
environments such as partial and starlight conditions, cones become ineffective.
Visual acuity decreases to 20/200 or less, and color is lost
A central night blind spot occurs when cone-cell sensitivity is lost.
Night Vision - CORRECT ANSWERS-Rhodopsin must build up in the rods for night
vision to take place. The average time to dark adapt is 30-45 minutes.
Night Blind Spot - CORRECT ANSWERS-Occurs when the fovea becomes inactive
under low-level light conditions. 5-10 degrees wide in the center of the visual field. The
greater the distance between the observer and the object the bigger the blind spot. Must
use off-center vision.
Scanning - CORRECT ANSWERS-Look left to right or right to left
Scan out then in (top to bottom) toward the aircraft
The stop-turn-stop-turn should be used
The scanning area should be 30 degrees wide w/250m viewing angle
Scan should overlap
Changing polarity should help identify obstacles.
Monocular Cues (GRAM) - CORRECT ANSWERS-Geometric Perspective: objects
appear to have different shapes when viewed at varying distances & from different
angle.
Motion Parallax:(Most Important) is the apparent relative motion of a stationary object.
Near objects tend to appear to move opposite the path mo motion (rapidly), while far
objects appear to move in the direction of motion (slowly) or remain fixed)
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