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For these people, looking at a bright light is enough to make them sneeze. 1  To find out if you are one of these people, try limiting your exposure to light and closing your eyes. 2  After your eyes have acclimated to the darkness, open your eyes and swiftly turn on a bright light.
Treatment of sleep and/or mood disorders by exposure to bright fluorescent lights (typically 10,000 lux) for at least 2 hours a day. Bright light therapy has been used as an alternative to drug therapy for seasonal affective disorder and insomnia (e.g., in shift workers). Want to thank TFD for its existence? Tell a friend about us, add a link to this page, or visit the webmaster's page for free fun content.