Table 3. Visual function and ocular fatigue of subjects exposed to 10 lux illumination during the 3rd night.
| Parameters | Without illumination | 10 lux illumination | P value | ||||
|---|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | ||||
| Objective parameters | |||||||
| Best corrected visual acuity | 1.00 | 0.00 | 1.00 | 0.00 | 1.000 | ||
| Refractory errors, diopter | −3.31 | 2.49 | −3.35 | 2.46 | 0.414 | ||
| Conjunctival hyperemia | |||||||
| Nasal | 17.14 | 9.37 | 21.07 | 11.00 | 0.016 | ||
| Temporal | 18.21 | 9.05 | 21.79 | 11.24 | 0.041 | ||
| TBUT | 3.96 | 1.91 | 3.52 | 1.79 | 0.061 | ||
| Maximal blinking interval | 10.73 | 4.66 | 9.36 | 3.39 | 0.060 | ||
| Ocular surface temperature | 34.54 | 0.86 | 34.46 | 0.90 | 0.165 | ||
| Subjective parameters | |||||||
| Tired eyes | 1.57 | 1.48 | 2.21 | 1.37 | 0.013 | ||
| Sore/aching eyes | 0.36 | 0.68 | 0.68 | 0.90 | 0.029 | ||
| Irritated eyes | 0.86 | 1.27 | 1.04 | 1.45 | 0.481 | ||
| Watery eyes | 1.00 | 1.36 | 1.04 | 1.37 | 0.902 | ||
| Dry eyes | 1.75 | 1.94 | 1.75 | 1.46 | 0.836 | ||
| Eyestrain | 0.29 | 0.66 | 0.43 | 0.88 | 0.271 | ||
| Hot/burning eyes | 0.25 | 0.65 | 0.21 | 0.50 | 0.914 | ||
| Blurred vision | 0.39 | 0.88 | 0.46 | 1.04 | 0.624 | ||
| Difficulty focusing | 0.07 | 0.26 | 0.39 | 0.74 | 0.024 | ||
| Vision discomfort | 0.07 | 0.26 | 0.32 | 0.55 | 0.008 | ||
SD = standard deviation, TBUT = tear break-up time.