Perscription glasses/sunglasses transition options

[Odin21]

I have searched through several threads on eyewear and have not found this discussed but if I missed it somewhere please let me know.

I wear glasses because the "E" on the eye chart looks like a dark blob. I have deployed once to Iraq and am getting ready to go to Afghanistan. Does anyone else have issues transitioning from glasses to sunglasses and what have your solutions been? I never even thought about the issue until we were doing urban training and I stacked on the door, entered the room, and then could not see squat because it was much darker in the room than outside and I still had on my Rx sunglasses. It took me several seconds of standing there looking like an idiot trying to get my ballistics off (with the nerd strap on under my ACH) and change into normal glasses so I could see inside. The other issue that I still have not quite resolved is sunglasses and glasses in a PT uniform. I don't think that you are supposed to leave your glasses on your head and wear your sunglasses, you can't just hang your glasses on your T-shirt like in civilian clothes, I was told that I cannot mount a glasses case to my combat glow belt, etc. The other solution is simply to carry them in your hand everywhere you go, but that limits your options of being able to carry anything else and still be able to salute, open a door, etc. I would have never thought there was this much going into having two pair of glasses, but I was mistaken evidently. The good news is that I am sure that I am not the first guy to run into this issue. Any ideas or personal past experience is greatly appreciated.

The reason that I posted this in the "Professional Gear" forum is that I saw some removable UV lens covers a long time ago and was wondering if anyone knew what they were. It was a pair of clear lens ballistics that could have the Rx inserts but had different color "films" for lack of a better phrase that stuck on the outside of the ballistics. You could have the "smoke" sticker on and when you went to go inside or it got dark it just peeled off and was supposedly very reusable. This seems like a beautiful solution, but I don't know who made them, if they were any good, etc.

The other option that I have seen and considered is simply replacing the "smoke" issued lens with a yellow one Sawfly or ICE have. It is my understanding that yellow is not really authorized even though they conform to the same safety rating, but some of the guys in my unit have them and no one has said anything because yellow allows you UV protection outside but still allows you to see inside. Is that correct?

Thank you all for your time and advice.