Green weakness is the most common form of color vision, which can be caused by organic lesions in the eye. Green weakness has a great impact on our life. In our daily life, green weakness patients often cause car accidents because they cannot recognize red and green lights correctly. This threatens our life and property. Therefore, we need to understand what are the diseases that cause green weakness in order to treat them correctly and avoid tragic accidents. The causes of green weakness are the following: 1. Malignant glaucoma It is characterized by increased postoperative intraocular pressure and the forward shift of the crystal iris septum, making the entire anterior chamber significantly shallower or even disappearing. It is often accompanied by weak green color, elevated intraocular pressure, red blood planes below the anterior chamber, uveitis, eye pain, eye distention and other symptoms. 2.Lens dissolving glaucoma appears in mature or over-ripe cataracts, and is an inflammatory glaucoma caused by lens proteins leaking through the lens capsule membrane, which is a secondary open-angle glaucoma. It is often accompanied by congestion, green weakness, calcification, elevated intraocular pressure, eye pain, edema and other symptoms. 3, color blindness Congenital color vision disorder is usually called color blindness, it can not distinguish various colors in the natural spectrum or a certain color. It is often accompanied by symptoms such as red blindness, photophobia, green weakness, blue-yellow weakness, and day blindness.