One never knows when an accident will occur. The number one safety precaution is Safety Goggles . A simple lab technique like decanting a solvent or measuring out a corrosive liquid can result in a tiny droplet being splashed out of the container. If that droplet were to land in your eye, serious eye damage or even blindness could be the result. The CHP states that all students, laboratory assistants, instructors, stockroom personnel, and visitors in the science laboratory, chemical storage areas, and laboratory and lecture preparation areas are required to wear safety goggles.
Eye protection is necessary every time there is a chance of spraying or splattering a chemical.
When working with a dry powder reagent, a dusty situation could allow particulate matter to enter you eyes. Every person entering a laboratory, even visitors and maintenance personnel, must wear appropriate eye protection. Many individuals try to avoid wearing safety goggles because they are uncomfortable. Or they put them on for a short time and then lower them to dangle around their necks. I even saw one student wearing safety goggles, pull the goggles up onto his forehead so he could see better while he was measuring a solvent into a 10 mL graduated cylinder.