Visual acuity 0.5 is the value of visual acuity expressed by decimal expression, corresponding to 4.7 in the Mew’s 5-point expression invented in China, which generally indicates abnormal visual acuity and suggests timely improvement of relevant examinations and taking corresponding measures. Check out visual acuity 0.5 suggests refractive abnormalities in the eye or eye diseases, it is recommended to go to a professional eye institution for eye vision testing, refractive examination, etc. to determine the specific refractive error, which may be farsightedness, myopia and other visual abnormalities, and then follow medical advice to wear suitable glasses for vision correction. In addition, after checking the visual acuity of 0.5, we should also observe whether there are uncomfortable symptoms such as double vision, eye swelling, eye pain, etc. If there are any of these abnormalities, it is suspected that there are eye diseases such as glaucoma, cataract, etc. It is recommended to seek medical attention in time and if necessary, treatment can be carried out through surgery to avoid continuous vision loss and even blindness. In daily life, avoid prolonged eye use, pay attention to eye rest, try not to read books or play with cell phones in bright light or dark environment, and recommend a light diet and avoid stimulating foods to prevent vision loss.