Many contact lens patients can benefit from also having spectacles, says Susan Taub, M.D. So can your bottom line. Dr. Taub reminds you that if you examine 20 contact lens wearers per week and convince only four of them to buy some other type of eyewear too, your revenues will rise. Even if these four patients purchase nonprescription UV-protective sunglasses, which at $100 are cheaper than prescription sunglasses, you’ll have boosted your bottom line by $400 a week.