Night blindness is not a recessive genetic disease; it is merely a symptom caused by many ophthalmic diseases. The primary manifestation is difficulty seeing in dim environments and requiring a longer time to adapt when moving from bright to dim settings. There are various causes of night blindness, with common ones including vitamin A deficiency, malnutrition of rod cells, and advanced glaucoma. Therefore, when a patient exhibits symptoms of night blindness, it is crucial to seek medical attention promptly. A doctor can determine the specific cause through a comprehensive examination and implement targeted treatment. The primary diseases causing night blindness are mostly non-hereditary; for example, vitamin A deficiency is mainly related to malnutrition and picky eating, which can be treated by supplementing vitamin A.