"I came across this business while looking for a light changing tint for glasses. They offered it. When it finally arrived, there were no instructions for applying the film and nothing on their website for glasses. When I reached out to the company via email, they pointed me to a motorcycle helmet install that involved bending the visor back and forth (something you can't do with glasses lenses). The film ended up much too stiff to apply to glasses and I am out the money. Avoid this terrible company with no customer service."