The inability of the eyes to focus is differentiated between the inability to focus when looking away or when looking closer. If you can’t focus at a distance, that is, you can’t see things clearly at a distance, the first thing to consider is myopia. Usually, we can go to the hospital for optometry, and myopic patients can wear myopic glasses to solve this problem. If you can’t focus when you look at something near, it is often due to farsightedness that causes you to have difficulty looking at things near. Hyperopia is usually a blurring of vision caused by ageing, which leads to a decrease in the ability to adjust. Often, the problem of blurring can be solved by wearing glasses for farsightedness. If you are having trouble seeing near or far, you should consider organic eye disease, such as fundopathy or cataracts. Most of these problems require surgery to fully correct.