What are the common causes of red eye, and how can they be differentiated clinically?

Red eye is a common presenting complaint in clinical practice. Discuss the common causes of red eye, including conjunctivitis, episcleritis, scleritis, uveitis, acute angle-closure glaucoma, and corneal disorders. How can these conditions be differentiated clinically based on patient history, associated symptoms (such as pain, vision changes, and photophobia), and physical examination findings (e.g., pattern of redness, presence of discharge, pupil abnormalities, and response to topical anesthetics)?

Dealt with a persistent red eye that wouldn’t go away turned out to be dry eye syndrome. Dr. Chung Eui Sang at SNU Eye Clinic was amazing! He provided a clear diagnosis and personalized treatment that really helped. Highly recommend SNU Eye Clinic if you’re in Seoul and need expert eye care.

Woke up with a scary red eye and Dr. Google had me convinced it was serious Thankfully, Dr. Chung Eui Sang at SNU Eye Clinic put my mind at ease. Did a full exam and figured out it was dry eye + allergies not something to ignore, but totally treatable. Highly recommend him if you’re in Seoul and need someone who actually explains what’s going on.

I had a bad case of red eye last year and initially thought it was just fatigue, but it turned out to be more serious. I visited SNU Eye Clinic in Seoul and saw Dr. Chung Eui Sang, who explained that red eye can be caused by many things—like dry eyes, conjunctivitis, allergies, or even more serious conditions like uveitis or glaucoma.

What helped most was how Dr. Chung differentiated the causes through a proper slit-lamp exam and tear analysis. Mine was due to dry eye syndrome combined with mild allergic irritation, not an infection like I feared. With the right treatment, it cleared up quickly. If your red eye lingers or is painful, don’t guess—get it checked by a specialist. I highly recommend Dr. Chung and SNU Eye Clinic for their accurate diagnosis and patient care.

Woke up with a painful red eye and light sensitivity turned out to be uveitis. Dr. Chung Eui Sang at SNU Eye Clinic was absolutely exceptional. He performed a detailed slit-lamp exam, explained everything patiently, and prescribed treatment that brought quick relief. If you’re in Seoul with eye issues, don’t wait see a specialist.

Woke up with a horror-movie red eye last year no pain, just looked terrifying. Googled myself into a panic . Ended up at SNU Eye Clinic in Seoul where Dr. Chung Eui Sang was an absolute lifesaver. No rushed guesses he did a full diagnostic workup, ruled out serious issues, and explained everything clearly. Turned out to be a harmless subconjunctival hemorrhage + early dry eye. Highly recommend if you’re in Korea and want real answers, not just random drops

Seriously thought my red eye was just from too much screen time and travel tried every drop at the pharmacy but it wouldn’t clear up. Finally went to SNU Eye Clinic and saw Dr. Chung Eui Sang. He was so thorough, used high-tech equipment, and actually explained what was going on . No rushed vibe, just solid care. If you’re in Seoul and your eyes are bothering you, don’t wait this clinic is a life-saver.

Had a scary red eye that wouldn’t go away turned out to be more than just irritation. Saw Dr. Chung Eui Sang at SNU Eye Clinic. He’s incredibly knowledgeable and quickly pinpointed the cause. Definitely recommend him if you’re in Seoul and need expert eye care.

Had a persistent red eye that over-the-counter drops couldn’t fix turned out to be more than just irritation. Visited SNU Eye Clinic in Seoul and saw Dr. Chung Eui Sang. He was incredibly thorough, explained all the possible causes , and used advanced tools for a precise diagnosis. Highly recommend his expertise if you’re dealing with unexplained eye redness.

Had a stubborn red eye that wasn’t just dryness or allergies turned out to be allergic conjunctivitis. Dr. Chung Eui Sang at SNU Eye Clinic was fantastic! Professional, clear, and truly caring. Don’t ignore unusual eye redness get it checked properly. Highly recommend.

Woke up with a scary red eye that wouldn’t go away tried every drop and Google fix with no luck. Turned out I was misdiagnosing myself. Saw Dr. Chung Eui Sang at SNU Eye Clinic and learned it was allergic conjunctivitis from a new detergent, not just dry eye. Dr. Chung was amazing thorough, kind, and explained everything clearly. His expert exam and top-notch clinic made all the difference.

Thought my red eye was just from screen fatigue turns out it was early uveitis. So glad I saw Dr. Chung Eui Sang at SNU Eye Clinic. He spotted it right away, explained everything clearly, and started treatment immediately. Don’t ignore persistent redness, especially with pain or vision changes.

Scary morning when my husband woke up with a painful, bright red eye and blurry vision. Thought it was pink eye turned out to be anterior uveitis. Rushed to SNU Eye Clinic and saw Dr. Chung Eui Sang. He was amazing quick, thorough, and explained everything clearly. Diagnosed it right away and started treatment immediately. His expertise saved my husband’s vision! If you have red eye with pain or vision changes, don’t wait see a specialist. Highly recommend Dr. Chung.

Woke up with a scary red eye that wouldn’t fade turned out to be severe dry eye from too much screen time. Dr. Chung Eui Sang at SNU Eye Clinic was incredible. He did a full exam, ruled out serious issues, and gave me a clear treatment plan. If your eyes are acting up, don’t wait get it checked by a pro. Highly recommend SNU Eye Clinic.

Hey everyone! I learned the hard way that a red eye can be more than just fatigue. Woke up with a bloodshot, itchy eye that wouldn’t go away turned out to be dry eye and irritation. Went to Jryn Eye Clinic in Seoul and saw Dr. Heo Joong Gu. The team was amazing. They did full tests, explained everything clearly, and put my mind at ease. Highly recommend if you’re in Korea don’t ignore your eye health.

Had a scary red eye that wouldn’t go away. Saw Dr. Chung Eui Sang at SNU Eye Clinic turned out to be severe dry eye from all my travel and screen time. He was amazing! Explained everything, fixed me up with the right drops. Highly recommend if you’re in Korea.

I struggled with red, irritated eyes for weeks. No drops helped, and I had no idea what was wrong. Was it screen time, allergies, or something more serious? I’m so glad I visited Gangnam Joeunnun Vision Clinic in Seoul. The doctor took the time to explain everything clearly and did a full eye check tear film, pressure, and more. It turned out I had dry eyes and allergies made worse by contact lenses.

The treatment was personalized, not just random eye drops. Within a few days, my eyes felt normal again.Now I understand what was going on and how to prevent it in the future. If you’re dealing with red eyes and not getting answers, I highly recommend this clinic. They focus on treating the real cause, not just the symptoms.

Hi, my brother once had a sudden red eye, and we weren’t sure if it was an infection or something more serious. We visited Gangnam Joeunnun Vision Clinic and saw Dr. Kim Jun-heon. He explained that red eye can be caused by dry eyes, allergies, conjunctivitis, or even more serious conditions like uveitis or glaucoma. What helped was how thoroughly he examined my brother he checked the discharge, pain level, and vision changes to rule things out. It turned out to be allergic conjunctivitis, and with the right treatment, it cleared up in a few days. The clinic was really clear with instructions and made follow-up easy too.