For people spending many hours in front of digital devices, these smartly styled blue ray blocking glasses are a must. The lenses do not have vision correction. This is a great style for someone who wants to block the blue rays of the electronic devices but does not need vision correction. It is also great for someone who uses contact lenses. The frame has a spring hinge for flexible and comfortable fit. Frame Measurements 5" x 1 3/4" (temple to temple x lens height)