Chapter 6.3 - Hearing and Vision Flashcards
The Outer and Middle Ear are mainly responsible for what?
Transmission of Sound.
The Inner Ear is mainly responsible for what (2)?
- Analysis of Sound Waves.
- Balance.
Name two major components of the Outer Ear?
- Ear Canal.
- Eardrum.
Name one major component of the Middle Ear?
Eustachian Tube.
Name two major components of the Inner Ear?
- Cochlea.
- Vestibular Apparatus.
What is the Cochlea main responsibility?
Hearing.
What is the Vestibular Apparatus main responsibility?
Balance.
Which part of the Ear facilitates equalising pressure?
Eustachian Tube.
Name the two light-sensitive cells in the Retina?
- Rods.
- Cones.
Which light-sensitive cell focuses on Colour, Far-Away Objects and is used for Day Vision?
Cones.
Which light-sensitive cell focuses on Peripheral Vision and Night Vision?
Rods.
Name three factors that decreases the oxygen for Night Vision?
- Altitude.
- Smoking.
- Carbon Monoxide.
How long does it take the eyes to adjust to sunlight?
30 seconds.
How long does it take the eyes to adjust to darkness?
30 minutes.
True or False. It is better to look at an object slightly to one side at night?
True.
What is the term given for short-sightedness?
Myopia.
What is the term given for long-sightedness?
Hyperopia.
What is the term given where the focusing power of the eye weakens with age?
Presbyopia.
True or False. It may take the eye several seconds to refocus when switching views between near, intermediate and distant visuals?
True.
What is the term given when the eyes overshoot/undershoot the visual target when focusing?
Visual Fatigue.
Name two symptoms of Visual Fatigue?
- Blurred Vision.
- Heavy Eyelid Sensation.
- Frontal Headaches.
- Sore Eyes.
What is Empty-Field Syndrome?
The cause of focusing on a distance without specific object in sight. The eyes relax so that you only see a couple of metres ahead of you.
How can a Pilot counteract Empty-Field Syndrome?
By finding an object before scanning the sky. This allows the eyes to condition itself for distance vision.
How can Haze affect vision?
It can make a target appear further away than it actually is.
How can Glare affect vision?
The bright light will reduce the ability for the eyes to see.
The effects of Glare, Haze or Drizzle are all accentuated by which factor?
Dirty Windscreen.
True or False. The position of the sun can also be a limitation to a Pilot’s vision?
True.
