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Table 2 The values of visual performance indicator of Acuity C Test (Ŋ- accuracy C) and visual acuity before and after the intervention

From: The effect of increasing the illumination on operators’ visual performance in the control-room of a combined cycle power plant

Time

Before intervention (Median ± IQR)

After intervention (Median ± IQR)

p-value*

Parameters

9:00 N = 16

Ŋ

0.33 ± 0.09

0.5 ± 0.12

< 0.001

Visual acuracy (\( \frac{1}{Arcmin} \))

1.62 ± 0.34

1.84 ± 0.38

< 0.001

15:00 N = 16

Ŋ

0.22 ± 0.12

0.32 ± 0.11

< 0.001

Visual acuracy (\( \frac{1}{Arcmin} \))

1.31 ± 0.56

1.52 ± 0.66

< 0.001

21:00 N = 16

Ŋ

0.33 ± 0.12

0.59 ± 0.1

< 0.001

Visual acuracy (\( \frac{1}{Arcmin} \))

1.20 ± 0.41

1.51 ± 0.31

< 0.001

3:00 N = 16

Ŋ

0.25 ± 0.13

0.34 ± 0.13

< 0.001

Visual acuracy (\( \frac{1}{Arcmin} \))

1.02 ± 0.24

1.23 ± 0.23

< 0.001

  1. *Wilcoxon Signed Ranks test
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Annals of Occupational and Environmental Medicine

ISSN: 2052-4374

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