Vision Care & Eye Injuries
What is the form number for prescription safety glasses?
F648.
What type of fabric should you avoid when layering?
Cotton. Takes too long to dry, and pulls heat away from your body.
What is the most common eye colour in the world?
Brown (~79%)
How thick should ice be to walk on or ice fish?
a) 4 inches
b) 5 - 7 inches
c) 8 - 12 inches
d) 12 - 15 inches
a) 4 inches
Explain the 20/20/20 rule
Every 20 minutes, look about 20 feet away for 20 seconds
How many degrees of frostbite are there?
Four
What is the average vision of an average MLB player?
a) 30/20
b) 20/20
c) 20/13
d) 20/10
c) 20/13. Someone with 20/20 vision can see what an average individual can see 20 feet away.
At -28 degrees Celsius (including wind-chill), there is an increased risk of frostbite. Exposed skin can freeze in how many minutes? (approx. range)
10-30 minutes
According to Mythbusters, why did pirates wear eye-patches?
Pirates wore eyepatches to preserve night vision in one eye. This would be useful in transitioning between above and below decks.
What country has the snowiest city in the world?
(Bonus: what city?)
Japan.
Aomori City has about 26 feet of snow on average. The average snowfall in Calgary is around 10.8 feet/year.