Slow and Tired: Clear sunglasses?:
"That might not make sense... unless you own a pair. Shields would be a better term. Basically, they are like sunglasses (usually non-prescription) with clear lenses. In the mountain biking world, I've often found them very useful. I've used them most on night rides in mud. If you've ever caught a glob of mud in the eye on a fast singletrack descent, you'll know just how useful they can be. Other obstacles that can ruin a ride include, but are not limited to: branches, dirt, dust, and bugs"
Clear Sunglasses/Eye Shields could be very useful when freeriding or downhilling... or in those buggy situations... or whatever you might come accross that poses trouble to the unpretected eye!
Dwight