I’ve been seeing Dr. Hoang for a few years. She’s always helpful and professional. Her office is located in the vision center at Walmart. The hours are convenient and no appointment is needed. I’ve never had any problems either walking in or calling a few hours ahead of time. She doesn’t sell contacts or glasses so there’s not a push to purchase either of those from her. She gives you your prescription that day and you can purchase your contacts or glasses from the business of your choice. I’ve never had any problems purchasing contacts online.