Corneal Metabolism Glucose, Oxygen, and Energy Pathways 1080p caption

Corneal metabolism explained clearly for PG ophthalmology exams - Glucose Sources, Oxygen Supply, Metabolic Pathways and Clinical Correlations covered in detail. In this video Dr. Prabha (Consultant Ophthalmologist) covers: Why the cornea needs so much energy despite having no blood vessels Three sources of glucose to the cornea - aqueous humor, limbal vessels and tear film Three metabolic pathways - aerobic glycolysis, anaerobic glycolysis and HMP shunt Oxygen sources - open eye versus closed eye Lactic acid accumulation and corneal edema - contact lens connection Hexose monophosphate shunt and NADPH production Rapid fire MCQs for exam revision Exam-focused key points for DNB, MS, DOMS, FRCS and FICO This is Part 2 of the Corneal Physiology series. Part 1 - Corneal Transparency and Hydration Control: [paste link here] Part 3 - Corneal Wound Healing: [paste link here] TIMESTAMPS 00:00 Introduction and Hook 01:00 Why Cornea Needs Energy 02:30 Glucose Sources - Aqueous, Limbal Vessels and Tears 04:00 Metabolic Pathways - Aerobic Glycolysis 05:00 Anaerobic Glycolysis and Lactic Acid 06:00 Hexose Monophosphate Shunt and NADPH 07:00 Oxygen Sources - Open Eye vs Closed Eye 08:30 Clinical Correlations - Contact Lens and Fuchs Dystrophy 09:30 Rapid Fire MCQs 10:30 Summary and Closing KEY EXAM FACTS FROM THIS VIDEO Most important glucose source to cornea = aqueous humor Aerobic glycolysis = major pathway = 85 percent of glucose metabolism Anaerobic glycolysis produces lactic acid = corneal acidosis = corneal edema HMP shunt produces NADPH = maintains glutathione = protects from oxidative damage Open eye = most important oxygen source is atmosphere Closed eye = most important oxygen source is aqueous humor Endothelium has highest energy demand in entire cornea Contact lens overwear = blocked oxygen = anaerobic metabolism = lactic acid = corneal edema Fuchs dystrophy = worse morning vision = closed eye = reduced oxygen = more edema overnight ABOUT DR. PRABHA Consultant Ophthalmologist | MBBS, DOMS, DNB Structured, exam-focused ophthalmology teaching for PG aspirants and patients. Subscribe to Ophthalmology Made Easy and hit the bell icon - Part 3 on Corneal Wound Healing is already live. Useful for: DNB Ophthalmology | MS Ophthalmology | DOMS | BSc Optometry | FRCS | FICO #CornealMetabolism #OphthalmologyMadeEasy #DNBOphthalmology