I can’t think of any job in the workshop where safety glasses aren’t warranted — even just sweeping the floor or using a Dremel tool. You’ve only have two eyes, and you’ve got to protect them. But what happens when you’re working on small parts (or your eyes just aren’t what they used to be? Forget those granny glasses you got at the drug store. Get some dioptric (reading) saftey glasses.
These glasses feature magnifying lenses molded into the lower third of the lens. Like most reading glasses they come in powers from 1.0 through 3.0, but otherwise they’re just like normal safety glasses. Just make sure the glasses you choose are American National Standards Institute (or ANSI) certified.
ANSI tests safety glasses to make sure they can withstand the impact of a quarter inch steel ball traveling 150 feet per second. Certified lenses will have “Z87” molded into or printed on them.
Other features to look for are ultra violet (UV) filtering and various tints and colorings that offer benefits depending on what sort of lighting conditions you work in. Street pricing for a set of these starts around $10.