A common problem for people who wear glasses with a very high prescription strength is a lack of selection when it comes to frames. As you increase the curvature of lenses, they become thicker. With higher prescriptions, lenses grow so thick that they can come in contact with the eyelashes or face, and extremely thick lenses are also difficult or impossible to insert into many stylish wraparound frames. Another issue is your vision: high prescriptions in wraparound frames cause distortion due to the thickness of the lenses and their abnormal nearness to the cornea. Generally speaking, wraparound frames are not a good choice for prescriptions where the cylinder measurement exceeds +/- 2.50 or the sphere exceeds +/- 5.0.