Currents may also be generated by density differences in water masses caused by temperature and salinity variations. These currents move water masses through the deep oceanâtaking nutrients, oxygen, and heat with them. Occasional events also trigger serious currents. Huge storms move water masses.
Ray-ban and most other manufacturers frames are made from Plastic compounds. Ray-ban used to make all its glasses out of 'glass'. Now it makes its sunglass products out of scratch resistent plastics. Often they will 'feel' like glass but are in fact most usually plastic production.
Prescription X-Ray Radiation Leaded Eyewear. Our Prescription X-Ray Radiation Leaded Eyewear is made with durable ANSI Approved safety frames and leaded glass lenses from the world's leading manufacturer: Schott A.G. The Schott SF6HT leaded glass lenses use ultra-refined lead oxide, for unsurpassed protection and optical clarity.