Monday night I learned an interesting fact that was both intriguing and a solution to an issue.  We were shopping for glasses and I was considering getting sunglasses with single vision instead of progression vision.  The optician asked me if I would be reading things with my sunglasses.  I mentioned that I usually lifted my sunglasses to see my cell phone screen and to read.  He told me to turn the cell phone sideways.  When I turned the cell phone sideways, I saw the screen with no problems!

While wearing polarized sunglasses, the reason you cannot see your cell phone screen or other LCD screens while they are in their normal position is because polarized lenses block horizontal light waves.  After turning the cell phone sideways, the light waves became vertical and the polarized sunglasses no longer blocked the light waves.  For this reason, pilots generally do not wear polarized sunglasses because they cannot see the instrument panels in the plane.