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Mean daily time outdoors, light exposure, diopter hours, near and intermediate viewing, and sleep duration are shown for the questionnaire, Clouclip, and Actiwatch.
| Parameter | Questionnaire | Clouclip | Actiwatch |
|---|---|---|---|
| Time outdoors (h) | 3.2 ± 0.3 | 0.9 ± 0.8 | 0.7 ± 0.1 |
| Daily light exposure (lux) | N/A | 347 ± 10 | 215 ± 31 |
| Time in near viewing (h) | 5.7 ± 0.6 | 6.1 ± 0.4 | N/A |
| Time in intermediate viewing (h) | 6.1 ± 0.5 | 1.6 ± 0.2 | N/A |
| Diopter hour (dh) | 26.1 ± 2.0 | 20.6 ± 1.1 | N/A |
| Sleep (h) | 7.5 ± 0.2 | N/A | 7.4 ± 0.3 |
