Ophthalmology Late onset endophthalmitis after cataract surgery is most often caused by: A Staphylococcus Epidermidis B Pseudomonas C Streptococcus Pyogenes D Propionobacterium Acnes 💡 Explanation Late onset endophthalmitis after cataract surgery is most often caused by: ✓ Correct Answer: D. Propionobacterium Acnes