It is interesting how many uses one can come up with for a basic pair of safety glasses. Make those safety glasses, and the uses increase. Prescription safety glasses are arguably just about as useful as it can get, as they provide not only the ability to see, but make life much safer for the person wearing them. After all, one of the problems with normal safety glasses is that they are usually close enough to the eyes that another pair of glasses cannot be worn underneath them; these glasses eschew that situation. http://safety.com.sg