ObjectiveTo observe the correlation between obstructive sleep apnea syndrome (OSAS) and central serous chorioretinopathy (CSC).MethodsFrom October 2016 to December 2018, 50 cases of CSC patients (CSC group) and 50 healthy people (control group) matched by age and sex who were diagnosed in the ophthalmological examination of Xi’an No.3 Hospital were included in the study. According to the course of the disease, CSC was divided into acute phase and chronic phase, with 20 and 30 cases respectively. The average age (Z=1.125) and body mass index (BMI) (Z=0.937) of the two groups were compared, and the difference was not statistically significant (P＞0.05); the age of patients with different courses of CSC (Z=1.525) and gender composition ratio (χ2=0.397) and BMI (Z=1.781) were compared, the difference was not statistically significant (P＞0.05). The Berlin questionnaire was used to assess the OSAS risk of subjects in the CSC group and the control group; polysomnography was used to monitor the apnea-hypopnea index (AHI) and minimum blood oxygen saturation (MOS) during night sleep. OSAS diagnostic criteria: typical sleep snoring, daytime sleepiness, AHI (times/h) value ≥ 5. The severity of OSAS was classified as mild OSAS: 5≤AHI＜15; moderate OSAS: 15≤AHI＜30; severe OSAS: AHI≥30. Non-normally distributed measurement data were compared by rank sum test; count data were compared by χ2 test. Spearman correlation analysis was performed on the correlation between OSAS and CSC.ResultsThe AHI data in the CSC group and the control group were 17.46±3.18 and 15.72±4.48 times/h, respectively; the MOS were (83.48±4.68)% and (87.40±3.82)%, respectively; those diagnosed with OSAS were respectively 36 (72.00%, 36/50) and 13 (26.00%, 13/50) cases. AHI (Z=0.312), MOS (Z=0.145), and OSAS incidence (χ2=21.17) were compared between the two groups of subjects, and the differences were statistically significant (P=0.028, 0.001,＜0.001). The AHI of acute and chronic CSC patients were 15.95±3.02 and 18.47±2.92 times/h; the MOS were (86.10±11.07)% and (81.73±4.58)%, respectively. There were statistically significant differences in AHI (Z=0.134) and MOS (Z=0.112) in patients with different course of disease (P=0.005, 0.001). The results of Spearman correlation analysis showed that OSAS and CSC were positively correlated (r=0.312, P=0.031).ConclusionOSAS may be a risk factor for the onset of CSC.