A 7-year-old boy was sent to our clinic because of left exotropia and decreased visual acuity in OS. On examination, visual acuity was 10/10 in OD and 2/10 in OS. Slit-lamp examination and intraocular pressure were normal in both eyes. While the right fundus was normal, there was a hard exudate plaque at the left macula associated with extensive peripheral retinal telangiectasia (fig. 3a). Fluorescein angiography showed wide areas of peripheral retinal nonperfusion and classic lightbulb type hyperfluorescent vascular dilatations (fig. 3b). Optical coherence tomography (OCT) exhibited serous macular detachment (fig. 3c). Our diagnosis was stage 3a Coats' disease. Therapeutic options and visual prognosis were discussed with the family, and we decided to proceed with indirect laser photocoagulation and a simultaneous intravitreal 0.7-mg dexamethasone implant injection. Under general anesthesia, indirect laser photocoagulation was performed in nonperfused areas and capillary dilations, and an intravitreal Ozurdex injection was given (fig. 4a). At week 6 after injection, the intraocular pressure was 28 mm Hg and timolol maleate and brinzolamide combination was prescribed twice a day. At 3 months after injection, the intraocular pressure was 15 mm Hg and antiglaucomatous medication was stopped. At 6 months after injection, visual acuity was 3/10 in OS and macular exudates were gradually resolving with no serous macular detachment (fig. 4b and c).