Polarised Glasses-try this test
Try this test:- put on your Polarised Glasses and look at a digital clock by tilting your head to the right...and you will see the screen go completley black. This will also effect your instruments when flying.
Tried and testd:- Polarising sunglasses should not be used when flying. The polarising filter interacts with the cockpit transparency to produce a distorted and degraded visual image.