Recently, the number of patients suffering from "red eye disease" has gradually increased, and there are often cases where a family is infected as a whole. Recently, the topic of "a woman's red eye disease infects her whole family, even her dog's eyes turn red" has made it onto the hot search list, and there has been a saying among the public that "red eye disease" can be transmitted at a glance... is this true? Patients with viral colds are susceptible to infection, commonly known as "red eye disease", which generally refers to acute conjunctivitis, mainly including epidemic keratoconjunctivitis, pharyngoconjunctival fever, and acute hemorrhagic conjunctivitis. These types of acute conjunctivitis can be caused by various viruses such as adenovirus, enterovirus, herpes simplex virus, etc. Therefore, especially in the current situation of seasonal changes and high incidence of respiratory infectious diseases, patients who have had a viral cold are more likely to "self transmit" red eye disease, which can then be transmitted to their families. Red eye disease can cause various eye symptoms, including redness, foreign body sensation, increased secretion, burning sensation, and tearing. If left untreated, the inflammation can be severe and may directly affect vision. "Red eye disease" is a highly contagious eye disease that has been prevalent worldwide in the past 40 years. It is highly contagious and susceptible to infection among the general population. It is mainly transmitted through contact and can be transmitted through swimming pool water, public bathing, and the use of public goods. It is more likely to cause epidemics in collective places such as entertainment venues, schools, hospitals, etc. Family members who have close contact with patients are also susceptible to infection. However, "red eye disease" does not spread through the air or respiratory tract, so it is an exaggerated rumor that a person with "red eye disease" can be infected at a glance. Ophthalmologists often receive a large number of patients with red eye disease in their daily work, but the probability of infection is very low. As a healthy person, if you have patients with red eye disease around you, try to keep them isolated and avoid contact, especially with objects that have come into contact with the patient's eyes. For example, towels used by family members and patients should be placed separately and not together; Cannot share a washbasin, it is recommended to wash your face with running water; Do not lie on the bed where the patient has been lying, especially do not touch the pillow, sheets, and bedding that the patient has used, as there may be residual secretions and tears from the patient's eyes on them. If you touch the above items, wash your hands as soon as possible with hand sanitizer, running water, or disinfect your hands with disinfectant such as 75% alcohol. Try not to touch your eyes with dirty hands in daily life. If you want to touch your eyes, you must disinfect your hands or use a disinfectant cotton swab to touch your eyes before touching them. If you accidentally come into contact with objects that the patient has come into contact with, or have been to a public swimming pool or bathtub and find a patient with "red eye disease", you can observe first or take preventive medication under the guidance of a doctor. In short, maintaining isolation, washing hands frequently, opening windows for proper ventilation at home, maintaining a regular lifestyle, relaxing the mind, and actively exercising can prevent infection. Wen/Song Dan (Beijing Tsinghua Changgeng Hospital)