Be well prepared before you come to the lab. Know what to do in case of emergency. Wear splash-proof goggles at all times. State and Federal law require the use of splash-proof goggles by anyone working in a chemical laboratory. The goggles must have a rubber seal which fits snugly against your face, an elastic strap which hold the goggles in place, and baffled ventilation.
Contact lenses pose several dangers.
First, contact lenses can absorb and react with fumes. Second, if you were to get a liquid or solid chemical into your eye, the chemical would get under the contact lens. A contact lens would hamper efforts to wash the chemical out of your eye, thus making the damage much more severe. Tie back long hair. Long hair can accidentally fall into flames or chemicals.