Table 1 Subjective questionnaire for watching 3DTV.
| Â | Nothing | Mild | Less moderate | Moderate | Less severe | Severe |
|---|---|---|---|---|---|---|
Headache | Â | Â | Â | Â | Â | Â |
Watery eyes | Â | Â | Â | Â | Â | Â |
Stinging | Â | Â | Â | Â | Â | Â |
Bleary | Â | Â | Â | Â | Â | Â |
Double vision | Â | Â | Â | Â | Â | Â |
Nausea | Â | Â | Â | Â | Â | Â |
Grittiness | Â | Â | Â | Â | Â | Â |
Dizziness | Â | Â | Â | Â | Â | Â |
Eyestrain | Â | Â | Â | Â | Â | Â |
Difficult focusing | Â | Â | Â | Â | Â | Â |
Vomiting | Â | Â | Â | Â | Â | Â |