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Table 1 Pupil responses to light

From: Impact of blue-depleted white light on pupil dynamics, melatonin suppression and subjective alertness following real-world light exposure

Blue-Depleted White LED

Illuminance

Baseline (arb. unit)

Phasic max constriction (%)

Sustained constriction (%)

Constriction Slope (%/s)

Dilation Slope (%/s)

PIPR 6 s (%)

32 lx

0.46 ± 0.072

−64 ± 5.8

−56 ± 4.2

− 8.2 ± 2.3

7.7 ± 1.0*

− 11 ± 6.7*

100 lx

0.43 ± 0.095

−63 ± 8.3

−54 ± 6.8

− 8.5 ± 3.5

7.1 ± 4.1

− 10 ± 13

140 lx

0.48 ± 0.056

− 67 ± 5.8

− 60 ± 4.7

−8.5 ± 2.1

6.4 ± 3.2

−19 ± 18

Standard White LED

Illuminance

Baseline (arb. unit)

Phasic max constriction (%)

Sustained constriction (%)

Constriction Slope (%/s)

Dilation Slope (%/s)

PIPR 6 s (%)

32 lx

0.45 ± 0.087

−62 ± 10

− 53 ± 11

− 7.2 ± 2.5

4.9 ± 1.8

−20 ± 3.5

100 lx

0.45 ± 0.097

− 65 ± 4.3

−57 ± 3.3

−9.2 ± 2.1

7.8 ± 2.8

−10 ± 11

140 lx

0.45 ± 0.094

−66 ± 4.5

−57 ± 6.5

−7.8 ± 2.3

5.1 ± 2.7

−23 ± 16

  1. Comparison of pupil responses to two different lamps – a blue-depleted white LED (top) and a standard white LED (bottom) – to three different illuminances of light. Light-induced changes in pupil size were normalized to percent of baseline pupil size. *p < 0.05 using a paired Student t-test. Data are presented as mean ± SD