Hiya,

The best way I've found was from some primitive wilderness instructer.

Put some ash from the campfire on your eyeglasses or watch (put a fair amount on) You'll still be able to see and they are significantly dulled down.

Just remember that you want to put the ash (white powdery stuff) on dry. If it has rained avoid the ash.

Give it a try. I give you a full money back guarentee!

-NIM