<prompt> Which of the following group of drugs can cause Cystoid macular edema?Prostaglandin F2a analogueProstaglandin E2 analoguesOral corticosteroidsa blockers  <response>: Ans. b Prostaglandin E2 analoguesRef: Becker-Shaffer Glaucoma 8e, p. 400Drugs causing Cystoid macular edema Benzylalkonium chloride Timolol Dinoprostone PGE2 analogues 