Worn lenses cannot be repaired. What the optical shop can do is to maintain the glasses and adjust the frames. These services usually do not require routine maintenance. Don't put glasses in a glasses case, wrap them in glasses cloth.

1 is generally acceptable. Treat lenses with liquid. You can wash your glasses under the tap for one minute, or you can wash them with special glasses cleaning solution. The effect of window cleaning spray is also good.

2. Do not treat lenses with liquids containing abrasive materials or high-concentration acidic substances. The lens surface is usually covered with a coating. When cleaning or wiping the lens, you actually only touch the outermost film. Repairing scratches means grinding off a small amount of coating. Therefore, in the early stage of scratch repair, the coating should be worn off as little as possible.

3. Wipe the glasses with a soft microfiber cloth specially used for cleaning the glasses. To clean lenses, you must use special fiber cloth for glasses. Don't wipe the lens with a rough cloth. Although the design of superfine fiber cloth is more suitable for grinding off the coating on the lens, in principle, the coating should be retained to the greatest extent.

4. Wipe the lens from left to right or from top to bottom. Don't rub the lens in circles, which will leave a round stain on the coating on the outer layer of the lens.