Normal adult naked eye vision should be 5.0 and above, so a naked eye vision of 4.3 does not meet the normal standard. There are many causes of vision loss, such as common refractive errors, cataracts, fundus diseases, etc. The treatment options for different diseases are different. If the vision loss is caused by refractive error, it is recommended to go to the hospital as soon as possible to do optometry examination, to clarify the degree of refractive error, and if necessary, wear glasses, and need to be worn for a long time, in order to ensure that a clear, long-lasting, stable vision. In addition, it is necessary to go to the hospital as soon as possible after the vision loss, to clarify the specific causes.