Each mold is made of tungsten carbide and is much heavier than it looks; a 4cm cube weighs around 1kg! These molds are used to make aspherical lenses, so their precision is highly important for ...

Beverly Hills optometrist Reuben Greenspoon is credited with first using lenses to augment a character's appearance. Greenspoon was tasked with changing an actor's eyes from natural brown to blue ...

Experts recommend people choose durable frames and lenses. Lenses made of Rivex, polycarbonate, glass, titanium or stainless steel are the strongest, St. Clair explained, adding that polycarbonate ...