Table 1.
Characteristics of participants, use of lenses and visual symptoms during the follow-up.
| Characteristics | Description | 1st Examination | 2nd Examination | 3rd Examination | Last Examination |
|---|---|---|---|---|---|
| Men (n) | 1537 | 1032 | 841 | 1138 | |
| Women (n) | 1558 | 1176 | 809 | 1070 | |
| Total (n) | 3095 | 2208 | 1650 | 2208 | |
| Age Years (mean ± SD) | 36.7 ± 10.5 | 41.1 ± 9.1 | 47.8 ± 8.2 | 46.5 * ± 9.3 | |
| Work seniority years (mean ± SD) | 7.4 ±6.7 | 9.2 ±6.5 | 13.7 ±7.0 | 14.5 * ± 7.4 | |
| VDT per day hours (mean ± SD) | 5.0 ± 2.5 | 4.8 ±2.1 | 5.4 ±2.0 | 5.4 ±1.9 | |
| Visual defects | Hyperopia % | 7.2 | 7.5 | 9.9 | 11.6 * |
| Myopia % | 46.8 | 44.7 | 45.3 | 45.1 | |
| Astigmatism % | 33.2 | 37.1 | 43.0 | 40.8 | |
| Presbyopia % | 22.3 | 36.8 | 61.3 | 52.3 * | |
| Use of lenses | % | 80 | 82 | 84 | 82 |
| Visual fatigue | Sometimes % | 46.3 | 48.8 | 48.4 | 50.3 |
| Often % | 12.1 | 13.8 | 17.3 | 13.7 | |
| Ocular redness | Sometimes % | 23.9 | 26.0 | 27.6 | 28.2 |
| Often % | 5.0 | 7.2 | 8.5 | 7.1 | |
| Ocular burning | Sometimes % | 20.9 | 22.1 | 21.9 | 23.7 |
| Often % | 4.5 | 6.6 | 7.6 | 5.82 | |
| Ocular tearing | Sometimes % | 11.2 | 12.4 | 14.5 | 15.6 |
| Often % | 2.5 | 3.4 | 4.4 | 4.2 | |
| Headache | Sometimes % | 9.5 | 12.2 | 10.8 | 11.2 |
| Often % | 2.5 | 3.5 | 3.6 | 2.8 | |
| Photophobia | Sometimes % | 8.2 | 10.9 | 11.4 | 9.0 |
| Often % | 2.0 | 2.8 | 3.4 | 3.1 | |
| Blurry vision far | Sometimes % | 10.6 | 10.5 | 9.8 | 9.9 |
| Often % | 2.7 | 3.0 | 3.1 | 3.2 | |
| Blurry vision near | Sometimes % | 6.8 | 10.0 | 11.2 | 9.8 |
| Often % | 1.9 | 3.1 | 3.8 | 3.1 | |
| Myodesmopsia | Sometimes % | 7.1 | 8.3 | 10.4 | 9.5 |
| Often % | 1.1 | 1.4 | 1.6 | 1.4 | |
| Double vision | Sometimes % | 6.2 | 7.9 | 9.2 | 7.0 |
| Often % | 1.5 | 1.4 | 2.1 | 2.1 | |
| Eye drop application | Sometimes % | 3.8 | 3.9 | 6.6 | 5.4 |
| Often % | 1.2 | 1.1 | 1.6 | 2.0 | |
| Anxiety | Sometimes % | 2.9 | 3.7 | 4.2 | 3.1 |
| Often % | 0.6 | 0.9 | 1.1 | 1.1 |
* p < 0.005.