Table 1.

Normative periocular measurements

Measurement	Total (Mean ± SD in mm)	Male (Mean ± SD in mm)	Female (Mean ± SD in mm)	P-value
MRD 1	3.5 ± 0.8	3.5 ± 0.8	3.6 ± 0.8	0.80
MRD 2	5.2 ± 1.0	5.5 ± 0.9	5.0 ± 1.0	< 0.01
PFH	8.7 ± 1.3	9.0 ± 1.2	8.5 ± 1.3	< 0.01
HPA	25.6 ± 2.0	26.1 ± 2.0	25.1 ± 1.9	< 0.01
IICD	33.2 ± 3.5	33.6 ± 3.6	32.9 ± 3.4	0.048
IPD	61.3 ± 3.5	62.5 ± 3.7	60.4 ± 3.2	< 0.01
OICD	84.1 ± 4.4	85.7 ± 4.5	82.9 ± 3.9	< 0.01

MRD marginal reflex distance; PFH palpebral fissure height; HPA horizontal palpebral aperture; IICD inner intercanthal distance; IPD interpupillary distance; OICD outer intercanthal distance