What causes red eye? The common causative organisms are S. pneumoniae kochweeks bacillus, S. influenzae, S. aureus and Streptococcus can also be seen. The latter two bacteria can normally parasitize the conjunctival sac without causing conjunctivitis. However, they can sometimes cause episodes of acute conjunctivitis when other conjunctival lesions and local or systemic resistance are reduced. The bacteria can come into direct contact with the conjunctiva through a variety of media and spread rapidly in public places, collective units such as kindergartens, schools and homes. This can lead to epidemics, especially in the spring and autumn when various respiratory diseases such as influenza and rhinitis are prevalent and conjunctivitis-causing bacteria may be transmitted via respiratory secretions. What are the manifestations of red eye and how is it diagnosed? In severe cases, there is heavy eyelids, photophobia and a burning sensation. Sometimes the secretions adhere to the pupillary area of the cornea, causing temporary blurred vision, which can be restored after flushing. When the lesion invades the cornea, symptoms such as photophobia, pain, and hypotony are significantly worse, and a few patients may also have upper respiratory tract infections or other systemic symptoms. On examination, the eyelids are swollen, and the conjunctiva is seen to be connected to the upper and lower lids by secretions. When the lesion invades the cornea, symptoms such as photophobia, pain and vision loss are significantly aggravated, and a few patients may also have upper respiratory tract infection or other systemic symptoms. On examination, the eyelids are swollen and the conjunctiva is congested and bright red, with the lids and the conjunctiva of the dome being the most prominent. In severe cases, the surface of the conjunctiva may be covered with a pseudomembrane that can be easily rubbed off, hence the name pseudomembranous conjunctivitis; the bulbar conjunctiva is congested and edematous to varying degrees and loses transparency. The corneal and conjunctival surfaces and lid margins are covered with mucous or purulent secretions, and in the case of kochweeks bacillus or diplococcus pneumoniae infection, the conjunctiva may be highly congested and edematous with scattered small punctate hemorrhages, and the corneal complications are mainly caused by kochweeks bacillus and manifest as cicatricial corneal rim infiltrates or ulcers, with lesions starting as superficial punctate corneal infiltrates located on the corneal The lesion starts as a superficial punctate corneal infiltrate, located on the inner edge of the cornea, and later the infiltrates fuse with each other to form an arch-shaped superficial ulcer, which may leave a cloudy appearance after healing. Generally speaking, the disease culminates in 3 to 4 days of onset and then gradually decreases, about 10 to 14 days to heal, caused by kochweeks bacillus and bacillus pneumoniae infection caused by more severe disease, sometimes accompanied by systemic symptoms, such as increased body temperature and general malaise, the course of the disease can last about 2 to 4 weeks, the disease often both eyes at the same time or 1 to 2 days apart. How should red eye be treated? In the early and peak stages of the disease, a smear of secretion or conjunctival scraping is performed to identify the causative organism, and a drug sensitivity test is performed to select effective drugs for treatment. For patients with a lot of secretions, the conjunctival sac can be flushed with 3% boric acid solution or saline. If there is not much secretion, the eye can be cleaned with a sterile cotton swab dipped in the above solution. Early cold compresses can reduce the eye discomfort caused by this disease. Topical treatment: according to the different pathogens choose a variety of antibiotic eye drops, such as sulfonamide acyl sodium oxyfloxacin eye drops, Tobias eye drops, etc., according to the severity of the disease every 2 to 3 hours or every hour; bedtime antibiotic eye ointment such as Telbital, erythromycin or oxyfloxacin eye ointment so that the drug in the conjunctival sac for a longer period of time, in the case of complications of keratitis should be treated as keratitis. Treatment should be timely, thorough, and prevent recurrence, and generally medication should be used for not less than five to seven days.