What is a Optical Technician? Optical technicians, also known as ophthalmic laboratory technicians, create eyeglasses and contact lenses as well as lenses for binoculars and other optical devices. They fill prescriptions from ophthalmologists and optometrists, ensuring that the lenses refract light at the proper angle to permit optimal vision.
Needled Silica Insulation. InsulBattÃ¤ 1800 High Temperature needled silica insulation is fabricated from high quality Silica that will not burn and will withstand continuous exposure to temperatures of 1800Â°F / 982Â°C. This material resists most acids and alkalis and is unaffected by most bleaches and solvents. It is highly flexible and conformable.
Familiarize yourself with these terms to help identify an extreme heat hazard: 1  Heat Wave - Prolonged period of excessive heat, often combined with excessive humidity. 2  Heat Index - A number in degrees Fahrenheit (F) that tells how hot it feels when relative humidity is added to the air temperature. Exposure to full sunshine can increase the heat index by 15 degrees.