Austin Eye Doctor with Highest Ethical Standards for Contacts and EyeGlasses and Eye Care. As you know doctors don’t sell products; except eye doctors who sell contacts and eyeglasses. Since most eye doctors derive up to 70% of their income from the sale of contacts and eyeglasses, they are greatly influenced in what brands and what products they prescribe because they benefit financially more from some products than from others. Additionally, the more often they prescribe glasses or contacts, the more their profit. Our Master Eye Associates offices do not sell any optical products. We are proud to be leaders of the profession to give you the freedom of choice to purchaseeyeglasses and contact lenses at much lower prices and at your convenience. Additionally, when our doctors prescribe contacts, glasses or medicine, you are absolutely assuredit is what is best for you-not what is best for the doctor’s office. Our Austin optometrists derive absolutely no financial benefit from what you are prescribed or how often products are prescribed.