TABLE 1.

Patient demographics and peripapillary retinal nerve fiber layer thickness measurements

	N = 110
Age (years)	58.8 ± 16.5
Female, n (%)	70 (63.6%)
Ethnicity, n (%)
Caucasian	68 (61.8%)
African-American	17 (15.5%)
Hispanic	13 (11.8%)
Asian	10 (9.1%)
Other	2 (1.8%)
Laterality, right eye, n (%)	64 (58.2%)
Spherical equivalent (diopters)	−0.35 ± 1.73
Cup-to-disc ratio	0.35 ± 0.11
Peripapillary RNFL thickness (μm)*
Global	96.1 ± 9.9
Superior	116.1 ± 17.9
Inferior	125.4 ± 15.9
Nasal	72.3 ± 13.2
Temporal	70.7 ± 12.8

Abbreviations: N = number; RNFL = retinal nerve fiber layer.

Results are expressed as means ± standard deviations unless otherwise stated.

^*RNFL thickness was measured using spectral domain optical coherence tomography (Spectralis HRA+OCT, Heidelberg Engineering, Heidelberg, Germany).