Fig. 12. Protective devices that are used when in an environment with heat hazards, such as furnace operations, pouring, casting, hot dipping, and welding. Operations involving heat may also involve optical radiation. Protection from both is required. See Figures 9 to 11 for devices that provide protection from hot sparks. The ANSI Z87.1 recommended face shield (left) and AOSafety® equivalent face shield screen, tinted or aluminized reflective (right) provides protection from splash from molten metals and high-temperature exposure. Face shield is worn over indirect-ventilation cup or cover goggles to protect from splash from molten metals and screen face shields or equivalent face shields are used for high temperature exposure. (ANSI type N from American Society for Safety Engineers: American National Safety Standard Practice for Occupational and Educational Eye and Face Protection. Des Plaines, IL: American Society for Safety Engineers. Aero face shield courtesy of AOSafety® Company, Indianapolis, IN. From Blais BR. Basics of industrial ophthalmology. Ophthalmol Clin North Am 13:308–343, 2000.)