I had an eye exam at my Costco in Southern California for $89. In Japan, where I used to live, eye exams are generally free at glasses stores, and frames with transition lenses only cost me around $100.
I exclusively use the optometrist at my Costco, and I don’t even carry vision insurance anymore because it’s so cheap. I’ve been doing this for about 6-7 years and have never had any issues.
I’ve used the optometrist at my Costco, and it was fine for an entry-level exam and refraction. However, as I got older, they noticed my eye pressure was going up and suggested I see an ophthalmologist, which I do now.