These are essential. There are all sorts of ways to make goggles. For example, students can tie a strip of clean plastic around their heads so that it protects their eyes. You can make goggles from clear plastic and stiff paper and cardboard. Sunglasses work great. Be creative! For science labs, goggles do not need to be impact resistant – they just need to stand between hazardous chemicals and your eyes. If you think there is any risk of students getting chemicals in their eyes, they should wear goggles. Anyone handling concentrated acid (or battery acid) should wear goggles. We only have two eyes, and they are very vulnerable to permanent damage. Skin heals after an acid burn – eyes may not.