At 11:02 13 June 2013, Doug Mueller wrote:
DO NOT FLY WITH NON POLORIZED LENS!
by doing so you trick your eye into opening wider because of the
shade. Remember polorization is used to protect from UV light. If
you open your eye wider by non polarized glass you expose your
eye to that UV light. You will damage your eye much quicker. It is
not a function of can you see your instruments or not. Do not be
mislead into this kind of thinking......
Most glider canopies are not made with polorized protection.


Absolute Nonsense. The UV that is damaging to eyes is that with a
wavelength less than 320nm. Looking at the chart on the Zeiss website here


http://tinyurl.com/qxfa6kj

you will see that nearly all the light below 500nm is blocked by the skylet
fun tint.

Furthermore, depending upon the type of perspex, your canopy will cut UV
below 400nm by a further 99%.