Years ago, my husband went to Sears Optical to purchase eyeglasses with his prescription. It took about a week for him to get his glasses and then, they were not properly fitted/adjusted. The bifocal lens were not properly adjusted to enhance his vision as per his prescription. He kept going back and they kept adjusting the glasses. After the third trip back he told them he was not satisfied with the glasses. They made him a complete new set of galsses which still were not proper. He brought the glasses to the eye doctors office to have them check the glasses out. The lens were "ground" wrong. He took them back to Sears Optical and they refunded his money.
He has been getting his glasses elsewhere ever since.