Table 2.

The Episcleral Vessel Density of the Superior, Inferior, Nasal, and Temporal Quadrants in the Limbus of the Three Groups

	Nasal Vessel	Temporal Vessel	Superior Vessel	Inferior Vessel
Group	Density %	Density %	Density %	Density %
Control	25.06 ± 1.75	27.72 ± 2.66	21.78 ± 1.38	25.56 ± 3.16
PWS	28.44 ± 2.47	30.19 ± 2.46	27.00 ± 2.82†	27.50 ± 3.32
SWS	33.29 ± 4.40†,‡	32.75 ± 3.81	35.75 ± 3.84†,§	33.50 ± 4.33*

Data are presented as means ± 95% CI.

^*Compared with controls, P < 0.05.

^†Compared with controls, P < 0.01.

^‡Compared with PWS group, P < 0.05.

^§Compared with PWS group, P < 0.01.