I m having chronic migraines in which direct sunlight or sitting in florescent lighting for long periods of time triggers these migraines. I asked my doctor to write me a letter so that I can be able to get window treatments so that when I m driving the direct sunlight doesn t cause me to have vision impairment. The doctor office wrote a letter, but it only stated they were treating me for migraines and light sensitivity. It states under the Michigan Legislature Section 257. 709 3(e) A special window treatment or application determined necessary by a physician or optometrist, for the protection of a person who is light sensitive or photosensitive, if the owner or operator of a motor vehicle has in possession a letter signed by a physician or optometrist, indicating that the special window treatment or application is a medical necessity. However, the special window treatment or application shall not interfere with or obstruct the driver s clear vision of the highway or an intersecting highway. So my question why would they write me a letter saying I do have light sensitivity and migraines but they refuse to write me a letter for window treatment?? Who do I need to talk to a eye doctor instead?