Long Term Effects of Exposure to Flashing Lights

Epliepsy

For about 1 in 4,000 people, exposure to flashing lights of various intensities and frequencies can trigger an epileptic fit. Many people are unaware they are sensitive to flashing lights until they have a seizure. This condition is called photosensitive epilepsy. Symptoms range from brief periods of "absence" to full-blown, physical seizing of the muscles. According to Cambridge Research Systems, there is growing evidence that long-term socio-psychological damage can result from the trauma of these seizures. Seizures can also be triggered by television, video games and computer screens.

No one yet knows what causes migraine headaches, but Bupa's health information team claim it might be a result of low levels of serotonin that elicit changes to the blood vessels in the brain. Migraine headaches can last anywhere from 1 hour to 3 days and flashing or flickering lights are a common trigger. About a third of migraine sufferers develop "aura" before a migraine starts. This includes the sensation of flickering lights, numbness, a tingling sensation in the hands and arms, a ring of light around objects, and slurred speech.

Anxiety is triggered by biochemical changes in the body because of a perceived threat of danger and the physical response to stress. Environmental or occupational exposure to flashing lights can cause heightened anxiety levels which cannot be expressed, but exhibit themselves in bouts of trembling, pacing, obsessive thoughts or nervousness. Long-term effects of anxiety may cause changes in the brain and can contribute to coronary artery disease.

The Cambridge Research Institute recommends certain precautions to avoid over-exposure to flashing lights. These include not watching television in a darkened room and keeping a six-foot or greater distance from television screens. In the presence of flashing lights, it is advisable to cover one eye, turn away from the direct source of the light, or even wear polarized sunglasses. If using a computer or playing video games, it is advisable to sit back at least six-feet, take frequent breaks and monitor the length of time children play.