There isn't any verification. They certainly don't call the optometrist to verify. Not saying I've done this, but one could submit an old Rx and change the date in Photoshop as well as the name and number of the doctor and buy contact lenses or glasses online just about anywhere. Theoretically, of course.
Of course, it's also both theoretically and practically fraud, and most people would rather spend the $100 on an eye exam every 2 years than expose themselves to rx fraud (2 years jail / $2k fine)
Yes, theoretically that is a risk. But practically, it has never and would never happen.
And an eye exam for specialty contact lenses is way more than $100. Really, more than $100 in many places just for a simple reading glasses RX. And many docs won't just do your Rx. They require you do a full exam.
