Eyesight - Kafli 5 Flashcards
What part of the eye bends the most light?
a. The cornea
b. The lens
c. The pupil
d. The retina
a. The cornea
Which part of the eye has the best visual acuity?
Fovea
The resolving power of the fovea decreases rapidly at only ………………… from its centre.
a. 5°
b. 13° to 16°
c. 3°
d. 2° to 3°
a. 5°
It is a term used when the eye, if it has nothing on which to focus will tend to focus between just under _ to _ metres
1 - 1.5 meters
Cones are mostly concentrated at the..
fovea
What part of the spectrum should sunglasses filter out?
a. The red and UV end of the spectrum
b. The blue and UV end of the spectrum
c. All high intensity light
d. UV only
b. The blue and UV end of the spectrum
Is a pilot allowed to fly wearing bifocal contact lenses?
No
What causes long or short sightedness?
a. Presbyopia
b. Astigmatism
c. Distortion of the eyeball
d. Distortion of the cornea
c. Distortion of the eyeball
What is the recommended course of action if encountering an electrical storm during flight?
a. Pull the visors down
b. Turn the cockpit lights down
c. Turn the cockpit lights to full
d. Put on sunglasses if available
c. Turn the cockpit lights to full
Dark adaption takes about __ min. for the rods and ___ min. for the cones.
30 min, 7 min.
The maximum number of rods are found ………………… from the fovea.
a. 10°
b. 20°
c. 15°
d. 30°
a. 10°
The amount of light allowed to enter the eye is controlled by the ___.
iris.
Hypermetropia is caused by a …………………. eyeball and is corrected by a ……………….. lens.
shortened, convex
Astigmatism is normally associated with the:
a. retina
b. fovea
c. iris
d. cornea
d. cornea
Hvað er astigmatism?
Astigmatism causes blurred vision. It occurs when the cornea (the clear front cover of the eye) is irregularly shaped or sometimes because of the curvature of the lens inside the eye.
Does colour blindness affect acuity?
No
Using the BMI formula, when will pilots be considered overweight?
25 males, 24 females.
Passaðu þig að ruglast ekki á obese og overweight.
What is the weekly level of alcohol consumption that will cause physical damage?
a. Consuming 22 units for men and 14 units for women
b. Consuming 21 units for men and 15 units for women
c. Consuming 24 units for men and 14 units for women
d. Consuming 21 units for men and 14 units for women
d. Consuming 21 units for men and 14 units for women
At what rate does the body remove alcohol from the system? __ unit per hour
1
Hvað mörgum klst fyrir flug þarftu að hætta að drekka?
8 klst
Hvaða sjúkdómur drepur flest fólk?
Malaría
Varðandi exercise þá er mælt með REGULAR exercise, auka hjartslátt 100%, og þá í __ mín __ á viku.
20 mín, 3x á viku.
What causes otic barotrauma and when is it likely to occur? Svar: Blockage in the eustachian tube which is most likely to occur in the climb/descent?
descent.
Er þá augað bara að leggjast saman vegna þrýstings utan frá?
A prudent pilot should avoid flying for ………………… hours having consumed small amounts of alcohol.
24 hours
