Thinness may vary by prescription. When compared with ordinary plastic lenses. Lightness may vary by prescription. Eye glass lenses are used to correct the vision of an individual. Lenses are held in place by eye glass frames.
Lenses come in a variety of materials.
The most common is plastic. The least common is glass. Growing in popularity is polycarbonate. These eyeglass lenses are more resistant to breakage. Besides the safety factor, these lenses are very good for a people with strong prescriptions.