Abstract Background: Post cataract surgery macular cystoid edema or Irvine-Gass syndrome is cystoid macular edema (CME) that occurs after cataract surgery. Optical coherence tomography (OCT) will show the extensive retinal thickening with an image of cysts (low reflectivity) in the inner nuclear layer and outer plexiform layers. Purpose: To determine the incidence of macular cystoid edema after cataract surgery and to provide an overview of the factors that have potential to cause CME by examining optical coherence tomography (OCT) in Haji Adam Malik Medan hospital and Dr. Pirngadi Medan hospital. Methods: This research is a descriptive observational prospective design. Post cataract surgery macular cystoid edema is examined with Optical Coherence Tomography (OCT). Result: There was not found post cataract surgery macular cystoid edema. There were significant differences in mean macula thickness after cataract surgery based on the type of surgery. There was an increase in mean macula thickness in ECCE technique cataract surgery with iris trauma and the rest of the lens cortex. There was no significant difference in mean post cataract surgery macular thickness based on age, history of hypertension and diabetes mellitus Conclusion: There was no post cataract surgery cystoid macular edema. There was a significant difference in the mean macular thickness after cataract surgery based on the type of surgery, an increase in the mean macular thickness in ECCE cataract surgery with iris trauma and the remains of the lens cortex and there was no significant difference in the mean macular thickness. post cataract surgery based on age, history of hypertension and diabetes mellitus Key Word: Irvine-Gass syndrome, Optical coherence tomography (OCT), mean macular thickness.

Irvine-Gass syndrome

Optical coherence tomography (OCT)

mean macular thickness.