Every frame from the Prescription Collection comes standard with a clear lens that your local eyecare professional can easily switch out with your prescription lens. The frame has a screw on each side of the frame under the temples, which allows it to split open for the lenses to be removed and replaced. Prescription frames should be filled by a certified local eyecare professional using a step bevel. They should be inserted through the inside of the frames. Trivex lenses are also recommended as well.