Results of the questionnaire study
| Question | Present (%) | Absent (%) | Total (%) |
|---|---|---|---|
| Q1 Both eyes are not pointing in the same direction | 911 (2.7) | 32724 (97.3) | 33635 (100.0) |
| Q2 Closing one eye in the sun or extreme light sensitivity | 2625 (7.8) | 31026 (92.2) | 33651 (100.0) |
| Q3 Squints eyelids together or frowns | 1210 (3.6) | 32457 (96.4) | 33667 (100.0) |
| Q4 Holding objects close to the eye | 6773 (20.1) | 26922 (79.9) | 33695 (100.0) |
| Q5 Tilts or thrusts head forward | 1302 (3.9) | 32340 (96.1) | 33642 (100.0) |
| Q6 One or both eyelids drooping | 434 (1.3) | 33125 (98.7) | 33559 (100.0) |
| Q7 Frequent blinking or eye rubbing | 2516 (7.9) | 29330 (92.1) | 31846 (100.0) |
| Q8 Often watering or mattering of the eyes | 1294 (4.1) | 30494 (95.9) | 31778 (100.0) |
| Q9 Eyelashes touching the eye surface | 488 (7.2) | 6274 (91.2) | 6762 (100.0) |