SHADES / SUNGLASSES WHATEVER YOU CALL THEM

[Ian Melville]

Yellow through orange to red increase the contrast. Think Black and White Photographic filters. However our vision is not B+W so severe colour distortion occurs. i.e if you wear orange/red lens colours you won't see red/orange/brown on your map etc However you may spot that other aircraft sooner in clag.

Other trades, train drivers for one, are restricted to grey tint. As far as I know reflections have nothing to do with the choice of colour.

Baseball caps create a blind spot.... discuss...

[Bob F]

Interesting point from Ron. Given the various answers the question needed asking. Has anyone who only needs near vision glasses used a company called Grett Optik? Based in Devon, they advertise a pair of normal sunglasses (various tints including grey) wth the bottom quarter segment a clear reading lens.

http://www.grettoptik.com/

PS: Will, I wouldn't encourage Ron over anything to do with Mile High!