Controlled Substances Act. An Act to amend the Public Health Service Act and other laws to provide increased research into, and prevention of, drug abuse and drug dependence; to provide for treatment and rehabilitation of drug abusers and drug dependent persons; and to strengthen existing law enforcement authority in the field of drug abuse.
What Is Polycarbonate ? The Stuff They Use For The Lenses In Sunglasses, Safety Glasses And Goggles. Polycarbonates are a particular group of thermoplastics. They are easily worked, molded, and thermoformed; as such, these plastics are very widely used in modern manufacturing.
With ordinary plastic lenses, a strong prescription can result in a thicker, lens. In contrast, high-index lens material will reduce lens thickness for greater comfort and a better appearance. When it comes to impact resistance, polycarbonate lenses outperform plastic and hi-index, and are typically a good choice for children and teenagers. Essilor and Hi-Index. Despite technological advancements, more than one-third of patients continue to be offered thick, fragile and outdated standard plastic lenses.