<prompt> Which of the following is the most impoant factor in the prevention of the endophthalmitis in cataract surgery?Preoperative preparation with povidone iodineOne week antibiotic therapy prior to surgeryTrimming of eyelashesUse of intravitreal antibiotics  <response>: Preoperative antibiotics ,povidine iodine solutions are used to prevent post operative infection. REF:khurana,pg no 197 