TABLE 2.

Retinal nerve fiber layer of the optic disc and macular thickness at baseline and after the ascent to high altitude (x ± s, μm).

Characteristics	Parameters	Baseline	High Altitude	p
Optic disc	Superior area	131.45 (15.09)	136.34 (16.52)	0.024*
	Inferior area	126.51 (30.65)	131.02 (19.51)	0.028*
	Nasal area	63.83 (10.03)	66.25 (10.41)	0.061
	Temporal area	74.99 (12.14)	76.16 (11.86)	0.437
	Mean thickness	99.35 (8.84)	101.84 (9.08)	0.030*
Macular thickness	Central subfield thickness	243.77 (19.37)	242.95 (19.69)	0.925
	Inner superior	327.32 (30.98)	327.93 (13.16)	0.119
	Inner inferior	319.57 (15.69)	323.78 (13.81)	0.054
	Inner nasal	311.25 (33.24)	312.98 (11.87)	0.106
	Inner temporal	324.76 (14.67)	328.29 (13.48)	0.089
	Outer superior	281.85 (13.46)	287.1 (13.47)	0.005**
	Outer inferior	270.22 (14.14)	273.51 (14.21)	0.089
	Outer nasal	266.14 (12.73)	269.27 (11.83)	0.045*
	Outer temporal	301.84 (18.28)	306.74 (15.09)	0.053
	Mean thickness	99.45 (11.07)	103.26 (8.96)	0.017*