Originally Posted by
greatscott
The only issue I have with Polarized glasses is certain LCD displays, like those found at gas pumps, I have to take the glasses off to read them, but my Sigma bike computer is LCD and I can read it just fine, and I have no problems with my car gauges but those aren't LCD. Not sure why some LCD I can read but others I can't.
Some LCDs are very good polarizing filters, so if the light comes out as X-polarized, and your glasses are Y-polarized, you won't be able to read the LCD (unless you turn it, or your head, 90°).