To receive a medical exemption, you'll need written certification from a physician or optometrist stating the medical necessity of tinted windows. How to fill out the Medical Exemption for Tinted Glass Restrictions?1. Gather required medical documentation. 2. If you have health conditions that necessitate darker tints, Massachusetts does allow medical waivers for tinted windows. I am supposed to get a Tinted Glass Waiver from Medical Affairs at the RMV.