I have been thinking about new glasses for awhile now and considering my options for getting the best results at a good price. There are places online for ordering your eyeglasses and generally the cost is less than in the brick and mortar shops you find in malls or at an eye doctor's office.
The two types of sellers, local and online seem are at odds with each other though. The online sellers of prescription eye wear need certain measurements to give you the results that will work for your comfort and vision. An eye doctor or the place in the mall takes these measurements as part of an exam with the expectation that you will purchase your glasses from them. It does cost a bit more but you get personal service. They are reluctant to give all these details to a customer and have them walk out the door to buy somewhere else.
My question to you is as follows. Are those measurements part of a prescription that should be handed to you so that you can shop for your new glasses where you like or is it a bit like getting your feet measured in one store to buy your shoes somewhere else?