What are the common diseases causing swelling in the fundus?

Common causes of swollen fundus include the following: 1. Fatigue and lack of sleep: Eye fatigue caused by prolonged crying, eye rubbing, or staying up late may lead to capillary or conjunctival congestion, resulting in redness and swelling of the eye. 2. Inflammatory diseases: Conditions such as dacryoadenitis and scleritis, caused by bacterial, viral, or parasitic infections, can result in fundal congestion and swelling, possibly accompanied by symptoms like fever and purulent discharge. 3. Allergic reactions: Allergic conjunctivitis—an abnormal immune response of the conjunctiva to allergens—is common in individuals with allergic predispositions and may cause eye swelling and redness. 4. Other eye diseases: Retinal vasculitis, diabetic retinopathy, and similar conditions may also lead to fundus swelling, requiring targeted treatment based on the specific underlying cause. Patients experiencing symptoms of fundus swelling should seek timely medical evaluation at a reputable hospital and receive appropriate treatment according to the diagnosis.