* I had an optometrist only give me a prescription for glasses, even though I indicated I wear contact lenses on my intake form and was wearing them at the appointment! When I realised a few days later after being denied trying to buy contacts with a glasses prescription, the optometrist said I would have to come in again and pay for a full consultation (out of pocket as my insurance only covers one per year).
* I've tried to buy contacts online in the US with an expired prescription, the retailers say their hands are tied, they need a current dated one.
I now just buy contacts online from Europe or New Zealand. No BS, same price, the EU company I buy from includes a mini bag of haribo gummies :)