The Association of British Dispensing Opticians (ABDO) of the U.K. has issued a comment on a report in Which? The British consumer testing magazine claimed that a quarter of the glasses it had procured from online shops failed one or more of its tests. In some cases, the glasses had measurements that didn't match the order or otherwise failed to meet British Standards, the magazine alleged. On 11 frames, the construction was poor, even for low-cost models. Eight frames had scratched, loose, warped or badly positioned lenses. Two had misplaced nose pads, and two had loose arms. According to ABDO's president, Clive Marchant, the cost of purchasing eyewear and lenses online often exceeds any initial savings in price. “Spectacles are first and foremost a medical device,” he says, recommending that customers have their vision checked and their preferred frames approved in person by an optician. Frames, regardless of their appearance, must suit the prescription,” he says, or else they can produce anything from “visual discomfort to blurred vision, making you unsafe in the work place or driving.” A poor set-up can also “induce lazy eyes or increase myopic progression.” Marchant recommends regular adjustments, which online retailers do not provide.