Ophthalmo👁️

Apuntes

Ophthalmology Time! Pupillary Light Reflex CN II = aferente, CN III = eferente Lesión CN II → no respuesta directa ni consensual Lesión CN III → pupila del lado afectado no responde Reflejo evaluado por el núcleo pretectal y Edinger–Westphal Prueba clave para localizar daño en tronco encefálico Clue: Luz en ojo derecho → ninguna pupila se contrae → lesión CN II Q: “What nerve carries the afferent limb of the pupillary reflex?” → CN II Keratitis Corneal inflammation → pain, ↓ vision HSV-1: dendritic ulcers Pseudomonas: contact lenses No steroids in HSV Tx: antivirals or antibiotics Clue: Painful eye in contact lens user Q: “Typical organism?” → Pseudomonas aeruginosa Optic Neuritis Painful monocular vision loss Associated with MS Afferent pupillary defect May show disc swelling Tx: IV steroids Clue: Pain + vision loss in MS Q: “Optic neuritis is seen in what disease?” → Multiple sclerosis CN III Palsy (Diabetic vs. Aneurysmal) “Down and out” eye + ptosis Diabetic: pupil spared (ischemia) Aneurysm: pupil dilated (compression) Parasympathetic fibers external Emergently image for aneurysm Clue: Ptosis + normal pupil in diabetic Q: “Why pupil spared in diabetic CN III palsy?” → Ischemia...