Patients with a red line in the eyes to see things, may be visual fatigue, vitreous clouding and other factors. 1. Visual fatigue: a red line in the eyes may be congested conjunctival blood vessels, the congestion of the eyes is related to long-term exposure to electronic products, staying up late and overworking, wearing contact lenses for a long time, mental stress, lack of sleep and other factors. 2. Vitreous clouding (1) the patient’s eyes to see a red line may also be caused by vitreous clouding, if the patient in front of the eyes of the wired floating, especially in the bright light can be clearly seen, and the light is not obvious in the dark place, the possibility of vitreous clouding is considered to be physiological, and the age of the growth of nearsightedness and other factors related to. (2) If you see the red color is slowly fading or fixed, you need to carry out funduscopic examination as soon as possible, and consider that it may be caused by pathologic vitreous clouding, such as vitreous hemorrhage. It is recommended that patients with red lines in the eyes and affected vision should consult a doctor in time to assess their condition and follow the doctor’s instructions for treatment.