sentences:  The patient needs urgent examination by an ophthalmologist, preferably a vitreoretinal specialist who will usually decide for urgent intervention to provide intravitreal injection of potent antibiotics.Injections of vancomycin (to kill Gram-positive bacteria) and ceftazidime (to kill Gram-negative bacteria) are routine.Even though antibiotics can have negative impacts on the retina in high concentrations, the facts that visual acuity worsens in 65% of endophthalmitis patients and prognosis gets poorer the longer an infection goes untreated make immediate intervention necessary.