Macular degeneration is a degenerative lesion of the retina that occurs in older people. Once macular degeneration occurs, the lighter it is, the less able to read and the heavier it is, the more it can lead to blindness. Measures to prevent macular degeneration: 1. The light emitted from the sun is visible light, which is violet light and blue light, these light is very damaging to the retina, and can cause the death of photosensitive cells, thus leading to macular degeneration. Therefore, when you go out, you should wear dark glasses to prevent the invasion of harmful light. There is also a way to identify the suitability of glasses, look at the UV index, the higher is the better. 2, smoking is the main cause of cardiovascular disease, is able to increase the macular degeneration. And smoking is able to produce different degrees of damage to the eye. Cigarettes have nicotine and carbon monoxide, which can change the viscosity of the blood, thus causing lesions in the blood vessels of the eyes. 3, you can use your hand to cover your eyes, the other eye to look at distant objects, check each eye vision is not reduced, or look at the window frame with lines, etc.. In addition, it is still necessary to pay attention to whether there is a black shadow in front of the eyes that occurs to block. If you find any abnormalities such as loss of vision or curved lines, you need to go to the hospital promptly.