The Effects of Strobe Light on Vision

Strobe lights gained popularity for use in dance clubs. However, today you'll find them in many more environments, including movie theaters, sports arenas and on automobiles. The effects of strobe lights on vision varies. Some people experience no adverse effect while others suffer harsh effects. Exposure to strobe lights may come by surprise and be unavoidable. However, knowledge of some effects may prepare you should that happen.
  1. Vision and Eye Health

    • When a strobe light is in operation, it produces bright illumination. If you stare directly into the strobe light, you may injure your eyes. Staring into bright flashing lights can cloud your line of vision, which causes you to strain in order to focus. This may dull your vision, resulting in tension headaches and focus issues. For some people there will be no lasting harmful effects to vision or to eye health. However, similar to staring into a "whiteout" caused by snow or a white computer screen, strobe lights affect vision by challenging your focus. This could prove dangerous where there are stairs or other hazards you need to see clearly.

    Stroboscopic Effect

    • Strobe lights have a stroboscopic effect on our vision. The stroboscopic effect can be described as the viewer retaining consciousness of a visual image for a short time after the image has disappeared.

      The strobe light will bring the number of images we see down to a range from one image to 50 images per second. When the number of images we see per second is reduced, the strobe light gives you the perception that the image you focus on is in motion.

    Strobe Lights and Epileptic Seizures

    • Repetitive visual light patterns are a known trigger for seizures. Photosensitive epileptics are at risk of seizure onset when exposed to strobe lights. The color of the light being projected by the strobe is not a factor in seizure onset. However, the repetition rate is a major factor. Those with photosensitive epilepsy may be sensitive to light projections ranging from five to 30 repetitions per second. Many epileptics are familiar with the risks of strobe light exposure. However, undiagnosed photosentitive epileptics may face a serious risk because they may expose themselves to strobe lights while being unaware of the risks.

    Precautions

    • Though strobe lights tend to enhance the excitement of an event or presentation, the risks they may pose far outweigh the event itself. Don't stare directly into a strobe light. Looking away from the lighted area gives your vision a break. It allows you to focus on what is actually present in the environment and may protect you from injuring yourself by falling or bumping into objects.

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