The main feature is the persistence of foggy eyes, which progresses gradually over time. 2. This is caused by corneal edema, which is formed when the atrial fluid penetrates the corneal stroma due to elevated intraocular pressure, and is usually accompanied by discomfort such as eye swelling and pain. 4. caused by iridocyclitis, patients often suffer from ankylosing spondylitis, rheumatoid arthritis and other diseases, and will have significant eye pain symptoms. Therefore, it is difficult for patients to determine the exact cause of the foggy eyes on their own, and they must seek medical examination to confirm the diagnosis.