Think Parkinson's. Visual clues as to what is or is not immediately in front of you can seriously impact your ability to make the nerves in your leg muscles wor

Think Parkinson's. Visual clues as to what is or is not immediately in front of you can seriously impact your ability to make the nerves in your leg muscles work correctly. Now, that said, maybe no one with Parkinson's should be going up any stairs of any sort. But I think glass stairs, even if frosted, would definitely be an ADA problem.