What does I/O stand for?

I/O is a common abbreviation used in regards to safety glasses and it stands for Indoor / Outdoor, a special light mirror "like" coating that is neither completely dark nor completely clear.

Indoor / Outdoor Safety glasses are sometimes referred to as a "go between" when choosing a middle ground between a clear and a dark lens. Basically Indoor/ Outdoor lenses reduce the available light by approximately 50%. Applications include, working in conditions where the available light changes frequently -as in the name suggests- working indoors and outdoors.

Click here to view I/O and other Safety Glass Products