Snapshot A 72-year-old man is referred to an ophthalmologist for slowly progressive vision loss in both eyes. He reports difficulty driving at night due to glare from headlights. His medical history is unremarkable. The patient undergoes pupil dilation and a comprehensive slit-lamp examination. He is found to have significant opacification of the lens in both eyes. Preparations are made to schedule him for cataract surgery. SUMMARY A cataract is an opacification of the intraocular lens login to view 2 more bullets Diagnosis is made clinically with a comprehensive eye examination Treatment is with cataract surgery, which involves removing the natural opacified lens and replacing it with a clear artificial intraocular lens Epidemiology Incidence login to view 1 more bullet Risk factors login to view 10 more bullets ETIOLOGY Pathophysiology login to view 2 more bullets Presentation Symptoms login to view 3 more bullets Physical exam login to view 2 more bullets Differential Refractive error login to view 2 more bullets Glaucoma login to view 3 more bullets Diabetic retinopathy login to view 3 more bullets DIAGNOSIS Clinical diagnosis Treatment Surgical login to view 5 more bullets Complications Reversible blindness Endophthalmitis following cataract surgery Prognosis High success rate of satisfactory visual outcomes with cataract surgery