There are many causes of eye lesions in chickens.

Sihe Township, Sihong County, Zhao Deyue reported on the phone that a month ago, he entered a batch of chicks, a total of 2000, and is now 35 days old. At the age of 25 days, some chicks showed tears in both eyes, and in the later stage, the eyelids were edema, and some chickens became blind on one side or completely blind in both eyes. at present, there are about 50 chickens suffering from the disease every day, and a total of 300 chickens have the disease. Sick chickens shrink their necks and stand stillly, do not eat much, gradually lose weight, scratch their eyes with claws, and have milky white thickens in their eyes when they want to be blind. The therapeutic effect of cephalosporins, roxithromycin and gentamicin was not good, and there was no improvement after vaccination of fowlpox vaccine, but there was no death in chickens so far. He sent sick chickens to Sihong County Animal Husbandry and Veterinary Station for examination. Due to limited conditions, he was unable to isolate and identify the pathogen and was not diagnosed. His neighbor Zhao Deguang's chicken also developed the same disease. He asked what disease the chicken had and how to treat it.

Corns is not an independent disease, but a local symptom and reaction of a disease. There are many kinds of diseases that cause eye diseases in chickens. from the symptoms, it is difficult to determine which disease is caused, and the diagnosis should be identified by etiology.

The common diseases that cause pathological changes of chicken eyes are: ⑴ eye Marek's disease. Also known as gray eye disease. Main symptoms: the iris pigment disappears and becomes grayish white or bluish gray (normally green chestnut or orange yellow); the pupil is narrowed, the edge is uneven, is jagged, and in severe cases, the pupil disappears and finally goes blind. ⑵ encephalomyelitis. Main symptoms: in the later stage, the surface of the eyeball was covered with a gray-white film, like cataract, bilateral blindness and multiple chicks. ⑶ vitamin A deficiency. Main symptoms: the exudate in the orbit is in the shape of milk or bean curd, the cornea is cloudy, and there are more feces on both sides of the eye. ⑷ eye type fowlpox. Main symptoms: eye abscess, can be extruded into a mass of cheese-like objects, unilateral majority, chronic process. ⑸ aspergillus ophthalmitis. Main symptoms: formation of caseous globules under nictitating membrane, bulging eyelid, central corneal ulcer. ⑹ mycoplasma (mycoplasma) disease. Main symptoms: initial tears, and then eyelid swelling, conjunctival redness, exudate from sticky to purulent, upper and lower eyelid adhesion, eyeball protruding, eyelid swelling. ⑺ infectious rhinitis. Main symptoms: spread from the upper respiratory tract to the eyes, significant head edema, eye abscess, secretions gradually increased, from serous to purulent, yellowish. Eyelid adhesion, edema, and finally eyeball inflammation and blindness. Most of them were unilateral eyes. ⑻ infectious laryngotracheitis, infectious bronchitis. Main symptoms: eye swelling, fear of light, eye closure, tears, eye redness, conjunctivitis. The majority of infectious laryngotracheitis are bilateral eyes, and most of infectious bronchitis are symptoms of unilateral eyes. ⑼ ophthalmic colibacillosis. Main symptoms: unilateral ophthalmitis, eyelid swelling, tears, viscous secretions.

From the situation reflected by Zhao Deyue, their chickens may be ophthalmic colibacillosis, mycoplasma disease, infectious laryngotracheitis, infectious bronchitis, but the diagnosis requires pathogen isolation and identification. If it cannot be diagnosed for a while, it can be treated symptomatically to alleviate the symptoms. For example, rinse the diseased chicken eyes with 3% boric acid solution, once a day; apply anti-inflammatory drugs, such as chlortetracycline eye ointment, etc. Chicken ophthalmopathy generally shows a chronic process, during the treatment need to supplement cod liver oil, in addition combined with antibiotics treatment.