The reasons for this situation are as follows: the dog has a foreign body sensation in the eye and scratches itself, causing damage to the inner membrane of the eye. The owner can instill anti-inflammatory eye drops; the dog gets angry and causes brown patches on the eye. The owner Anti-inflammatory eye drops can be instilled; the above conditions will be significantly improved within a week of continuous use of eye drops. If there is no improvement, it is recommended to send the patient to the doctor for examination.