The cat's inability to open one eye may be caused by conjunctivitis, keratitis, foreign bodies in the eyes, etc. You need to first check whether there are foreign bodies in the cat's eyes. If there are foreign bodies, they need to be removed in time. If there are no foreign bodies, and the eyes If there is a lot of secretions from the cat's eyes, it may be caused by an eye disease. You need to use saline to clean the cat's eye secretions, and then instill anti-inflammatory eye drops.