Grossly unethical and unprofessional.
I received an eye exam from this shop for contacts and glasses. After I received the results and insurance paid for the exam, the sales person took the contact lens prescription from me (when I wasn't looking). She told me that I could not have both prescriptions and would have to pay for another exam (the exam I just took!). She then said "You're not going to get that information. I threw it away." This is destruction of health information, which is grossly unethical and possibly illegal.
Needless to say the woman was disrespectful and insulting; the other staff person looked the other way and told me I "would have to call the boss later."