Try a different location, do not go to Mayo location with Doctor Edward Singer. The doctor was very cold and rude. I simply inquired about monovision because I have never worn contacts and he acted like it was so horrible for me to even ask and so horrible that someone would tell me about it. Then I simply inquired about contacts that I can sleep in and immediately he said "if you want to be lazy, you can go somewhere else". I have my masters and a great job at age 24, I am not lazy, but I would just like to know about the sleep in kind for ease and convenience. The front desk lady was also cold and unpleasant. The only positive part was the guy that started the vision tests, he was friendly.