DISP - Sunglass Standards - Week 11

Question 1

When prescribing sunglasses for pronaopes and protanomals, what guidelines should be followed?

Answer 1

Avoid lenses that transmit less red, as these individuals see less red than normal.
Also avoid lenses that transmit more red, as it will reverse brightness cues and is especially important for things like driving and traffic lights.

Question 2

What colour do brown lenses typically transmit more of?

Answer 2

Red

Question 3

What is the ideal colour lenses for sunglasses when prescribing for colour defective observers?

Answer 3

Use grey lenses

Question 4

What colour lenses should especially be avoided in protans?

Answer 4

Brown lenses

Question 5

What negative effects can polarised sunglasses have when used in cars?

Answer 5

Splotches can be seen on heat-treated rear windshields