My wife, not a PWP, goes to sleep well after me, and she will turn lights on (e.g., in the closet or bathroom) as she prepares for bed, and this would always wake me up. To deal with this I got a sleep mask that I use to cover my eyes. This is the one I use:
amazon.com/gp/product/B000W...
It is very comfortable on the eyes and does a great job of keeping the light out (my wife is much less a disturbance now!).
You can find this and other sleep tips in the "#6 Fix your sleep." section of: "Things you can do to improve your Parkinson's experience.".