After 37 years, Carney received the Medal of Honor on May 23, 1900, for his heroism during the assault on Fort Wagner. When Carney died in 1908, the U.S. flag flew at half-mast at the Massachusetts State House. See the Library of Virginiaâs entry on William Harvey Carney.
Disadvantages. 1  Glass is the heaviest material used in the manufacture of lenses so eyeglasses with glass lenses will be the heaviest. 2  Thickness of the glass lenses: if you have large diopters lenses will be thicker. 3  Glass breaks easily: if you ride eyeglasses on the floor, you have a chance to run out of lenses.
1 Trivex lenses. 2  These lenses are made from a newer plastic with similar characteristics of polycarbonate lenses. 3  They are lightweight, thin, and impact-resistant and may result in better vision correction than the polycarbonate lenses for some people. 4  High index plastic lenses.