When you look at the light at night, you will have a scattering of light, which is usually a sign of refractive error, including farsightedness, myopia or astigmatism, all of which may cause this symptom. Therefore, if you have this symptom, you need to go to the hospital for vision and optometry examinations to find out if there is refractive error in your eyes and the degree of refractive error. If there is refractive error, and the degree is relatively large, resulting in a significant loss of vision, to wear glasses early to improve vision, so as to maintain a clear visual quality in the usual, see more clearly, also more comfortable, but also to avoid the occurrence of eye fatigue. In addition, the sudden onset of significant light scattering, or even yellow-blue artifacts, should be ruled out for the presence of iridocyclitis, and timely consultation with a hospital to avoid serious vision damage.