Opthal: Allergic Conjunctivitis: Free MSRA Podcast

🎧Deep Dive: AllergicConjunctivitis – MSRA Ophthalmology EssentialsYou know that itchy,watery, red-eye feeling—especially during spring or when your pet curls up nextto you? That’s where today’s deep dive begins. We're unpacking allergic conjunctivitis — what it is, whatcauses it, and how to manage it effectively, especially for your MSRA prep. 👁️What Is It?An inflammation of the conjunctiva triggered byallergens like pollen, pet dander, or dust mites. It's your immune systemoverreacting to harmless substances. 🧬PathophysiologyExposure toallergens → IgE binds to mast cells →release of histamine and inflammatory mediators→ itching, redness, watering, and swelling. 📌Key Risk Factors• Personal or familyhistory of atopy (eczema, asthma,allergic rhinitis)• Seasonal pollenexposure (hay fever overlap)• Indoor allergens(dust mites, pets)• Contact lens use(risk of Giant Papillary Conjunctivitis) 🧠Symptoms & Signs• Intense itching – the hallmark symptom• Bilateral red, watery eyes• Puffy eyelids,chemosis (conjunctival swelling), papillae under lids• History ofseasonal allergy or atopic conditions ❗DifferentialDiagnosisDon’t confuse itwith:• Infective conjunctivitis (viral/bacterial –sticky discharge)• Uveitis, keratitis (pain, photophobia, visionloss)• Blepharitis, scleritis, glaucoma – especiallyif pain, photophobia, or unilateral🔍 Always ask: Is it itchy or painful? Pain = red flag 🚨 📊Epidemiology• Affects up to 40% of the population• Common in childrenand young adults• Oftenunderdiagnosed• Peaks in spring/summer (pollen), but can be perennial (dust/pets) 🩺Diagnosis✅ Primarily clinical✅ Based on history + bilateral itch/redness🔬 Investigations (if needed):• Conjunctival swab(to exclude infection)• Allergy testing(if severe/recurrent)• Slit lamp exam(for papillae, corneal involvement)• Fluoresceinstaining (if keratitis suspected) 💊Management (UKNICE-Based)1️⃣Avoidance – limit allergen exposure2️⃣Cool compresses +artificial tears3️⃣Topicalantihistamines – fast symptom relief4️⃣Mast cell stabilisers – prevent recurrence5️⃣Oral antihistamines – useful if hay fever present6️⃣Steroid eye drops – only under ophthalmology care🚫 Avoid rubbing eyes – it worsens inflammation! 📈When to Refer🔺 Severe or persistent symptoms🔺 Need for topical steroids🔺 Unclear diagnosis🔺 Suspected sight-threatening causes (uveitis,keratitis, etc.) 📅Prognosis✅ Excellent in most common forms(seasonal/perennial)⚠️Vernal and atopickeratoconjunctivitis carry risk ofcorneal damage – need specialist input✅ Vision usually well preserved with proper care 🧠MSRA Key Takeaways• Itch = Allergy• Bilateral, red,watery eyes = classic• Atopy is a strongclue• Rule out painful, unilateral, or vision-threateningcauses• Topicalantihistamines + stabilisers = 1st-line• Refer if red flagsor steroid needed🎓 Mnemonic: ITCH = Intense Tearing, Chemosis, Hyperaemia🧰 Management: Avoid, Antihistamines, Artificial tears, Atropine(stabiliser)📤 Referral if Pain, Photophobia, Poor vision 📚Revision Links📝 Notes: https://www.passthemsra.com/topic/allergic-conjunctivitis-revision-notes/🧠 Flashcards: https://www.passthemsra.com/topic/allergic-conjunctivitis-flashcards/❓ Accordion Q&A: https://www.passthemsra.com/topic/allergic-conjunctivitis-accordion-qa-notes/🔥 Rapid Quiz: https://www.passthemsra.com/topic/allergic-conjunctivitis-rapid-quiz/🧪 Quiz Bank: https://www.passthemsra.com/quizzes/allergic-conjunctivitis/ 🎓 For more structured MSRA revision, visit:🌐https://passthemsra.com🌐https://freemsra.com