As much as they probably see it, it would be surprising if they do care. When I had carpal tunnel surgery about a year ago, I had my toe nails painted. The bedside nurse said she was going to take off the sock things they gave me to wear to the OR, and put my socks back on. I protested this because my feet are smelly, prone to athletes foot outbreaks, fungal rashes, and probably have psoriases (I really do need a biohazard sign tattooed on them). I really hate that she probably took my protesting because of the nail polish, but no one seemed to care or think anything of it.