There are two types of eye redness. One is cosmetic eye redness, which is clinically common in cases of inflammation, foreign body, impingement, dry eye, visual fatigue, keratitis, iritis, etc., resulting in irritation of the conjunctiva of the eye and dilated blood vessels, which requires further examination in ophthalmology for identification and then appropriate treatment, which generally has a better prognosis. If there is a flaky hemorrhage under the conjunctiva, it is considered a subconjunctival hemorrhage, which is usually related to trauma, hypertension, violent choking and coughing, and large low head, etc., and can be observed. If there is no hemorrhage in the fundus, waiting for the blood to absorb naturally is fine. If the patient complains of redness in front of the eyes, usually with a cloudy feeling in front of the eyes, and it affects the vision, consider that there are blood cells into the vitreous cavity, this situation is mostly caused by bleeding in the fundus, the patient will usually be combined with medical diseases, such as diabetes, hypertension, etc., need to do further detailed examination in ophthalmology, and take active treatment to preserve vision.