Night blindness is a common symptom in ophthalmology and can be caused by many reasons. Once night blindness occurs, patients need to promptly visit an eye clinic for a face-to-face examination to diagnose the cause, and then treat it based on the specific cause. The common causes include the following:

First, it can be caused by late-stage glaucoma. Surgery is needed to reduce intraocular pressure to halt the progression of the disease; otherwise, it may lead to complete blindness.

Second, it can be due to a deficiency of vitamin A, related to long-term poor diet and malnutrition. It often also includes symptoms such as dryness of the conjunctiva and softening of the cornea, which can be treated by taking vitamin A capsules orally.

Third, it is caused by malnutrition of the rod cells in the retina. Currently, there is no effective treatment for this condition.