A 46-year-old man was diagnosed with obstructive sleep apnea and began using a nasal continuous
positive airway pressure (CPAP) during sleep for a month. He presented with the complaint of a painful
blurred vision in his left eye upon awakening two days earlier. His visual acuity was 20/25 both eyes. There
was a mild anterior chamber reaction in the left eye. Fundus examination showed a localized choroidal
effusion at the inferotemporal part of the left retina. The patient received topical 0.1% dexamethasone four
times daily and temporarily discontinued the CPAP. By one week after treatment, the choroidal effusion was
completely resolved.

Keywords: Choroid diseases, Complications, Continuous positive airway pressure, Sleep apnea obstructive