Eyephd offers you a variety of glasses such as anti blue light glasses, progressive multifocus reading glasses and photochromic sunglasses.If your eyes have a special diopter, please don't hesitate to tell us about custom lenses.Satisfaction Guarantee:We want your company to be not just one time, but also for repeat jobs. To make sure we deserve your trust, we want you to be happy with your purchase!In the event that due to our faults or omissions or faulty product you would like to return a purchased product, please contact us at the email address so that we can resolve the problem.At your request, either a full refund or a replacement of goods or parts will be made within 30 days.Product Issues After this initial 30 days, a free spares case will be handled with free spares.Cleaning tips:-You can wipe the lens with alcohol or a cleaning cloth.-Use soft material such as cleaning wipes; Do not use paper towels or other rough materials.Prevention:-Choose the correct level of the lens (the PRESBYOPIA level increases with age).-If you have any questions, please feel free to contact us.