A optometrist I went to did my eye exam for $90, and then I decided I wanted the prescription to get my own contacts.

First, I asked, and they denied it. Then I literally had to pull out this law and they finally granted it. But they did everything they could to obstruct me. Literally they refused to scan it and wanted me to show up in person. Then while writing it, the doctor himself said "sad to see you don't support our business". (For people living in Boston, the place was Custom Eyes in Central Square.)

I was surprised by the divergence between the law and how pissy the doctor got when I tried to exercise my rights.