Table 4 Comparison of the values of visual performance indicators before and after the intervention

Before Intervention

9:00

15:00

p-value

21:00

3:00

p-value

Ŋ-acuity C N = 16

0.33 ± 0.09

0.22 ± 0.12

< 0.001^*

0.33 ± 0.12

0.25 ± 0.13

< 0.001^*

Visual acuracy (\( \frac{1}{Arcmin} \)) N = 16

1.62 ± 0.34

1.31 ± 0.56

< 0.001^*

1.20 ± 0.41

1.02 ± 0.24

< 0.001^*

Ŋ-contrast C N = 16

0.2 ± 0.12

0.14 ± 0.08

< 0.001^*

0.22 ± 0.08

0.11 ± 0.06

< 0.001^*

Percentage of Contrast (%) N = 16

0.75 ± 0.86

1.51 ± 0.9

< 0.001^*

0.55 ± 0.32

1.13 ± 0.64

< 0.001^*

After Intervention

9:00

15:00

p-value

21:00

3:00

p-value

Ŋ-acuity C N = 16

0.5 ± 0.12

0.32 ± 0.11

< 0.001^*

0.59 ± 0.1

0.34 ± 0.13

< 0.001^*

Visual acuracy (\( \frac{1}{Arcmin} \)) N = 16

1.84 ± 0.38

1.52 ± 0.66

< 0.001^*

1.51 ± 0.31

1.23 ± 0.23

< 0.001^*

Ŋ-contrast C N = 16

0.41 ± 0.12

0.31 ± 0.09

< 0.001^*

0.53 ± 0.08

0.31 ± 0.07

< 0.001^*

Percentage of Contrast (%) N = 16

0.52 ± 0.85

1.39 ± 0.88

< 0.001^*

0.43 ± 0.31

1.04 ± 0.64

< 0.001^*