TD 66

Question 1

EXPLAIN DARK ADAPTION AND HOW LONG IT TAKES TO REACH OPTIMAL NIGHT VISION
ACUITY.

Answer 1

Your eyes start to produce rhodopsin (visual purple) the mor erhodopsin, the better your night vision. optimal levels of rhodopsin require 30 to 45 minutes.

3-04.4 pg. 4-2

Question 2

WHAT PROTECTIVE EQUIPMENT IS USED TO PROTECT AGAINST THE LOSS OF NIGHT
VISION?

Answer 2

• sunglasses
• red-lens goggles
• supplemental oxygen above 4,000 feet PA

3-04.93 pg. 8-11

Question 3

NAME AND DESCRIBE THE THREE TYPES OF VISION.

Answer 3

photopic (uses mostly cones)
mesopic ( uses rods and cones(most dangerous))
scotopic (uses mostly rods)

4-03.93 pg. 4-1

Question 4

EXPLAIN THE DAY AND NIGHT BLIND SPOTS.

Answer 4

day blind spot: originating from where the optic nerve attaches, 5.5 to 7.5 degrees, compensated for by binocular vision
night blind spot: occurs when fovea becomes inactive, 5 to 10 degrees, objects in it will fade away after 2 seconds

tc 3-04.93 pg. 8-5

Question 5

ACCORDING TO AR 95-1, WHEN OPERATING WITH NVGS, AT LOW ALTITUDES WHERE
THE FLASH FROM THE BOTTOM ANTI-COLLISION LIGHT IS REFLECTING BACK INTO THE COCKPIT, CAN YOU TURN OFF THE BOTTOM ANTI-COLLISION LIGHT?

Answer 5

Anti-collision lights will be on when aircraft engines are operating except when conditions may cause vertigo or other hazards to safety.
Commanders may authorize exemptions to lighting requirements in threat environments or for night vision device (NVD) flights when operating per AR 95–2.

AR 95-1 pg. 9