I have a few eye issues that my doctor sought fit to give me a letter stating that I have extreme light sensitivity and should be exempted from the window tint regulations. I brought this letter to the MVA, and they said "keep it in the car, if you get pulled over, we don't do anything with it." Today I was driving on 95, after passing a stopped radar car, I took a picture of an 'unmarked' MSP car speeding along (pushing traffic to flow over the speed limit) because I hadn't seen a MSP charger with external lights, I disagree with this practice, and I like to post these pictures to facebook later in the day to let folks know what cars to watch. Almost 5 seconds later, he hit the brakes and flipped his lights on. So I figured I was getting a speeding ticket. Oh well, I'll pay it. He came up to the car, and informed me that I was pulled over for windshield tint. I was baffled. I told the officer "I have the letter from my eye doctor right here--" and he cut me off and said "Why, because you can't wear sunglasses?" I was wearing sunglasses. I responded by saying "No sir, I have extremely sensitive and light colored eyes." I offered the letter holding it in my hand with my license and registration, but he said it wasn't correct, "the law is the law." He took my license and registration and went back to run it. He came back with a ticket book, and told me he was writing a repair order, and it wasn't a ticket. He apologized for taking so long, he said it took a long time for my info to come back. He explained the process of the repair order, and told me that I should go back to my doctor and get them to properly do the medical exemption. He was very courteous, and I have no issues with the way this was handled by the officer. When I received the letter from the doctor initially, I took it to the Bel Air MVA, and they told me that they didn't do anything with it. The MSP officer today didn't want anything to do with the letter. The motor vehicle code states that exemptions are possible. The question is what is the process to get a proper medical exemption in MD?