Safety glasses are used to protect your eyes from objects that could bruise, pierce, or damage them. They are commonly used during:
There are three parts that compose safety glasses.
All of these parts have been previously tested so that they can withstand a 1/4 inch steel ball that is traveling 150 feet per second.
If you already wear some prescribed eyeglasses then you will need to get lenses for your safety glasses that will fit your prescription. You can also get some safety goggles that will fit over you prescribed glasses instead depending on your preference.
Safety glasses are going to have small gaps on the top, side, and bottom of the glasses. If you need protection against any debris that gets into the air such as metal shavings or saw dust then you are going to need safety goggles. This is also true for proper protection against any liquids. The goggles will provide a 360 degree protection for your eyes.