1st, let me stress that I am in no way associated with this company and not trying to get you to buy something. However, here is a truly useful product for those who need help putting on dress shirts.
I came across this company when I wrote article about them for our local Parkinson Support Group. I had a chance to speak with the creator who is a wonderful person dedicated to helping people with Parkinson's.
The company is Magna Ready and they make a line of men's and women's dress shirts with magnetic closures for all the buttons.
Watch this inspirational video of how this idea started with trying to help her husband and his challenges with Parkinson's.
Company website: magnaready.com/shop/home.php
I hope you find this useful.