Note:
During daylight, "seeing" another aircraft is generally the result of seeing a reflection of sunlight off of the wings, propeller, plexiglas,etc. of the other aircraft.Polarized glasses will reduce the ability to see the glare and thus the other aircraft. I believe this to be a safety hazard.
For CAP fliers, polarized glasses will reduce the ability to see reflections off of crashed aircraft debris.

Irv Botton