Need to see and read the weather better in all climatic conditions (seeing the cloud formations better) with less difficulty and less stress on the eyes, and less tension on the face.
Comfort under the head set without headaches, and without breaking the seal for extended periods of time.
Being able to clearly read all digital avionics (Not Polarized)
Losing flying privileges due to eye conditions, and/or diseases caused by unnecessary exposure to the sun.
Avoid seeing the annoying "blotches" in the windscreen produced by polarization
Personal Eye Protection to avoid Cataracts, Cancer, Macular Degeneration & more
See, and spot approaching aircraft in all conditions
Be able to read maps, charts, and instruments in the dark cockpit without taking the sunglasses off.