Binocular blindness refers to the loss of vision in both eyes due to trauma or disease. 1. Trauma: The eye is an important organ for visual function. If the eye suffers from trauma that causes structural and functional damage, or suffers from a disease that impairs its function, the worst case scenario will result in binocular blindness. 2. Disease: Many diseases can cause blindness, such as advanced glaucoma, severe diabetic retinopathy, optic neuritis, uveitis, etc. Only through timely detection of the existence of the disease and early treatment can eliminate the disease to save eyesight. There are many other reasons for blindness, such as congenital blindness, etc. Therefore, when patients experience eye discomfort symptoms, they must immediately go to the ophthalmology department of the hospital, and do not wait until the disease is so serious that it causes blindness before treatment.