Goggles fit tightly to the face to protect eyes from impact, liquids, and particulates. A strap fits snuggly around the head to hold the goggles in place. Protective goggles are often worn in chemical manufacturing, healthcare, and construction. Clear lenses do not filter light, making them a good choice for wearing indoors or when moving between lighting conditions. Dark lenses reduce light, glare, and eye strain when working outdoors or in bright light. Amber (or yellow) lenses filter haze and blue light to improve contrast in low-light conditions. Green lenses filter infrared light created during welding operations. Readers have built-in magnification to make reading, inspection, and fine detail work easier. OTG (over-the-glasses) eyewear fits over most prescription glasses.