Congenital night blindness is the collective name for a large group of disorders that are either present at birth or gradually manifest due to congenital developmental abnormalities, and can have many different causes. Some cases can be cured: First, night blindness is caused by vitamin A deficiency, due to insufficient breast milk after birth and the use of substitutes for feeding, resulting in vitamin A deficiency, which can be completely cured with vitamin A supplementation, but if not treated in a timely manner can cause complications such as corneal softening. Second, it is caused by optic rod cell malnutrition, which is related to genetic factors, and there is no good way to cure it. Third, it is caused by retinitis pigmentosa, which is also a genetic disease, and can develop since birth with increasingly severe symptoms, or it can start to show symptoms gradually in adulthood, and there is no effective method to treat it.