Essential tremor is a condition that causes involuntary shaking. While it usually develops in middle age, it can start much earlier. Shari Finsilver was aware of her hands shaking as a child. When I was about 11 years old, I noticed in art class that I was never able to draw a straight line, she says. I really didn't know why.
Shuron, LTD is the only major manufacturer of American eyewear frames still thriving. The majority of its products are produced in Miami and Sunrise, Florida, then distributed through its South Carolina headquarters.
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.