"The yellow-tinted glasses described by Georgiansilver are used for shooting over iron sights, specifically because of their ability to enhance image definition."

I have used shooting glasses in dull, snowy or foggy days and I have found them to be effective in sharpening image definition. They also tend to make the sourrounding look somewhat like sunlight...improving driving mood (IMO).

However, they should not be used at night.....from my expeience, that is.