Late onset endophthalmitis after cataract surgery is caused by

Bacterial endophthalmitis: This is one of the most dreaded complications with an incidence of 0.2 to 0.5 percent. The principal sources of infection are contaminated solutions, instruments, surgeon&;s hands, patient&;s own flora from conjunctiva, eyelids and air-borne bacteria. Symptoms and signs: Present between 48 and 72 hours after surgery and include: ocular pain, diminshed vision, lid oedema, conjunctival chemosis and marked circumciliary congestion, corneal oedema, exudates in pupillary area, hypopyon and diminished or absent red pupillary glow. Delayed chronic postoperative endophthalmitis : is caused when an organism of low virulence (Propionobacterium acne or staph epidermidis) becomes trapped within the capsular bag. It has an onset ranging from 4 weeks to years (mean 9 months) postoperatively. Ref:- A K KHURANA; pg num:-200,201