Sentences with phrase «glass or plastic lenses»

Unlike standard glass or plastic lenses, which have fixed parameters, the optical properties of an electrically tunable lens can be dynamically controlled using an electric current.

5 Eyeglasses can correct vision because light changes speed when it passes from air to a glass or plastic lens; this causes the rays to bend.

Not exact matches

Treatment and the provision of false teeth or dentures, normal ear tests and the provision of hearing aids, cosmetic or plastic Surgery (including deviated nasal septum), routine dental expenses, eye refractions or eye examinations for the purpose of prescribing corrective lenses for eye glasses or for the fitting thereof, unless caused by Accidental bodily Injury incurred while insured hereunder;