Table 2.

Pupil measurement comparisons

	PIH (n = 31)	no-PIH (n = 30)	P
BPD, mm	3.946 [3.415–4.387]	4.166 [3.679–4.752]	0.286
MPD, mm	3.248 [2.756–3.709]	3.300 [2.998–3.538]	0.931
PCL, s	0.200 [0.167–0.233]	0.184 [0.133–0.300]	0.483
PCT, s	0.433 [0.400–0.500]	0.417 [0.392–0.500]	0.618
ACV, mm/s	1.696 ± 0.577	2.118 ± 0.474	0.003
MCV, mm/s	2.736 ± 1.128	3.855 ± 0.882	< 0.001
1/MCV, s/mm	0.372 [0.302–0.476]	0.260 [0.224–0.314]	< 0.001
CR, %	82.841 ± 5.903	78.602 ± 4.762	0.003

BPD Baseline Pupil Diameter, MPD Minimum Pupil Diameter, PCL Pupil Constriction Latency, PCT Pupil Constriction Time, ACV Average Constriction Velocity, $ACV=\frac{BPD-MPD}{\mathit{PCT}}$; MCV Maximum Constriction Velocity, 1/MCV the reciprocal of MCV, CR Constriction Ratio (%),$CR=\left(\frac{\mathit{MPD}}{\mathit{BPD}}\right)\times 100\%$

Normally distributed results were reported as means ± standard deviation ($\overline{x}$ ± s), while non-normally distributed data were reported as the median [interquartile range]. Categorical data were reported as numbers (%)