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General information
| Question text: | Do you see symmetrical heat waves in the center part of your vision that move outward (scintillating scotoma) when you experience new flashes of light in your vision like the image below?
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| Answer type: | Radio buttons |
| Answer options: | 1 Yes 2 No 3 I don't know |
| Label: | see symmetrical heat waves in center part of vision that move outward |
| Empty allowed: | One-time warning |
| Error allowed: | Not allowed |
| Multiple instances: | No |