## 3 Results  
Within the studied group, patients with mild or moderate primary open-angle glaucoma, with moderate or severe dry-eye syndrome, patients with floppy-eyelid syndrome, an optical non-arteritic ischemic neuropathy case, and a patient with retinal central vein occlusion were identified. No case of keratoconus or central serous chorioretinopathy was identified. Of all the patients with SAS (N = 65), 64.6% had mild airflow obstruction, and 7.7% severe mixed syndrome. Severe mixed apnea syndrome was found only in males, and 71.4% of the patients with average obstructive syndrome were male (\(p\) = 0.046). The age ranged from 28 to 88 years, registering a significantly lower average level in patients with severe mixed syndrome, compared to the highest average level recorded in patients with mild obstructive syndrome (53.40 vs. 67.52 years; \(p\) = 0.036). About 80% of patients with severe mixed apnea syndrome and 85.7% of patients with moderate obstructive syndrome came from urban areas, while 63.6% of patients with severe obstructive syndrome came from rural areas (\(p\) = 0.131). Among patients with sleep apnea, 32.3% were experiencing NTG (normal tension glaucoma), 23.1% POAG (primary open-angle glaucoma) and 30.8% dry-eye syndrome (Figure 1). Comparing the percentage distributions of sleep apnea syndrome by types of glaucoma, the following aspects were highlighted:  
* 60% of total POAG cases and 61.9% of total NTG cases were associated with mild obstructive sleep apnea;
* 45.5% of patients with severe obstructive SAS were also experiencing NTG;
* 40% of patients with severe mixed syndrome were experiencing NTG while 40% POAG;Body mass index (BMI) ranged from 27 to 44.26 kg/cm\({}^{2}\) with no statistically significant correlation to the type and severity of the apnea. The lowest mean level was recorded in patients with mild obstructive syndrome, and the highest in patients with moderate obstructive syndrome (33.05 vs. 34.57 kg/cm\({}^{2}\); \(p\) = 0.875). By types of glaucoma, BMI did not show any significant differences between mean scores. From the total group of glaucoma + SAS, 81.5% were obese (BMI index over 30 kg/cm\({}^{2}\)) and 60% hypertensive (arterial tension value over 129/70 mmHg). The lowest mean level of AHI/h (apnea/hypopnea index/hour) was recorded in patients with moderate obstructive syndrome, while the highest was in patients with severe obstructive syndrome (\(p\) = 0.043) (Figure 2 and Table 1). By types of glaucoma, AHI/ha recorded the highest average level in patients with other types of glaucoma and those with dry eyes (\(p\) = 0.05). The correlation between AHI/h and BMI was indirect (having a value minus, with a small value, r is a small indirect correlation, so when one variable is high, the other is low) and low in intensity, but the result could not be extrapolated to the general population (r = \(-0.111\); \(p\) = 0.377), while AHI/h and age were apparently independent parameters (r = \(-0.072\); \(p\) = 0.568). Regarding the structural changes, at the level of RNFL (retinal nerve fiber layer), depending on the sleep apnea syndrome, the average level of disk area of the studied eye was lower in mild obstructive SAS and the highest in severe mixed SAS (1.98 vs. 2.45; \(p\) = 0.081). By tracing the ROC curve, it is emphasized that the area of the optical disk is a good predictor in determining the severe types of SAS (AUC = 0.842; IC95: 0.632-1.051; \(p\) = 0.012) (Figure 3): cut off score = 2.37; sensitivity = 80% and specificity = 80%. Depending on the sleep apnea syndrome, the mean level of the central macular thickness of the studied eye was lower in severe OSAS and the highest in mild signifycative OSAS (249.60 vs. 274.05; \(p\) = 0.130), but the differences were not statistically signifycant. In the applied case study, the ROC curve validates that the macula thickness was not significantly associated with SAS severity (AUC < 0.600).