Because they don’t work as well as a highly skilled optician with years of experience.
Listen: we love gadgets, gizmos, and technology more than anyone and love implementing it into our office. However, there is a huge difference between flashy computerized whatchamadoodles to look cool vs. useful high tech.
If I were running an optical business online, or with hundreds of locations around the world, I would absolutely implement the measuring by computer image only. Why? I could bring someone in off the street and within 5 minutes teach them how to run the computer. It is difficult and expensive to train opticians on all the subtleties of frame selection, adjustment and measurements.
Our product is caring, and we care about achieving the perfect fit. Every time.