Welders have a high incidence of eye injury due to foreign bodies, such as slag, spatter, sparks, dust and grit. Wire and chemicals can also present a hazard if mishandled.
Particles can enter the eye, if not protected, during de-slagging. As the slag is often removed while still hot, the injury can be compounded by additional corneal burns.
Spatter from the welding process can cause quite nasty injuries because of its temperature and velocity.
Grinding sparks, dust and grit
Debris from the grinding disks can get into the eye of the operator, and other workers at some distance from the actual grinding operation.
Chemicals used before and after welding such as degreasing and cleaning fluids, acetone, dye penetrant, acidic or caustic etching solutions, can be splashed into unprotected eyes, causing nasty injuries.