can the material used to make eyeglass lenses
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.
Disadvantages. 1  Glass is the heaviest material used in the manufacture of lenses so eyeglasses with glass lenses will be the heaviest. If you have a larger frame type, will leave marks on the nose due to pressure. 2  Thickness of the glass lenses: if you have large diopters lenses will be thicker.