Endophthalmitis is an internal eye infection, also known as an intraocular infection.

There are many different types of endophthalmitis.  The most common type — post-operative endophthalmitis — usually occurs as a result of cataract surgery. The condition is not necessarily attributed to poor surgical execution; it may occur even when the procedure is routine and uncomplicated. Of course, surgical complications may increase the incidence of this infection.

What are symptoms of endophthalmitis?
Symptoms include sudden-onset vision deterioration, pain, and red eye. These symptoms usually occur 3 to 12 days following surgery.

What causes endophthalmitis?
The most common cause of endophthalmitis is bad luck; in fact, every individual shares a 1 in 1,000 chance of having this condition. However, patients with a history of traumatic cataract, diabetes or those who experienced complications during surgery, are at an increased risk of infection.

What are the treatments for endophthalmitis?
Antibiotics and, sometimes, steroids are injected into the eye and the patient is started on frequent topical antibiotic eye-drops. Patients may also be scheduled for a vitrectomy (surgical removal of the vitreous humor).