Flicker vertigo from wikipedia, the free encyclopedia jump to: navigation, search     flicker vertigo, sometimes called the bucha effect, is "an imbalance in brain-cell activity caused by exposure to low-frequency flickering (or flashing) of a relatively bright light. cheap viagra online viagra online " [1] it is a disorientation-, vertigo-, and nausea-inducing effect of a strobe light flashing at 1 hz to 20 hz, approximately the frequency of human brainwaves. Viagra onset and duration of action tesco to sell half-price viagra over the counter [2] [3] the effects are similar to seizures caused by epilepsy (in particular photosensitive epilepsy), but are not restricted to people with histories of epilepsy. buy viagra without a script what do real viagra pills look like This phenomenon has been observed during helicopter flight; a dr. Viagra usage Do insurance companies cover viagra Bucha identified the phenomenon in the 1950s when called upon to investigate a series of similar and unexplained helicopter crashes. cheap generic viagra Flicker vertigo in a helicopter occurs when the pilot or front passenger looks up through the blades of the main rotor as it turns in the sun causing the light to strobe. what do real viagra pills look like The strobe light effect causes persons who are vulnerable to flicker vertigo to become disoriented, lose control of the aircraft or have a seizure. viagra for sale A similar situation can occur in fixed wing flight whenever flickering light conditions exist. female viagra canadian pharmacy An example would be looking through a slowly spinning propeller while the airplane is landing facing the sun. viagra for sale [4] according to the us naval flight surgeons manual, flicker vertigo is a rare occurrence. natural viagra for women [5] flicker vertigo has been considered as a principle for various forms of non-lethal weapon. viagra walmart plan [6] a related crowd-control device was invented by charles bovill, which "employed a combination of ultra-sonic waves and strobe lights to induce acute discomfort, sickness, disorientation and sometimes epilepsy. buy cheap viagra " [7] [edit] references ^ (online article requires logon) clarence e rash: awareness of causes and symptoms of flicker vertigo can limit ill effects: human factors and aviation medicine: vol 51: number 2: mar-apr 2004: flight safety foundation ^ bunker, robert j. what do real viagra pills look like (july 1997), nonlethal weapons: terms and references , p. viagra schmelztabletten 10 mg rezeptfrei  17, isbn 9781428991934 ,   ^ lyell (september 1997), non-lethal weapons: draft general report , p. buying generic viagra  3,   ^ ronson, jon (2005), the men who stare at goats , p. how are viagra and viagra different  147, isbn 9780743241922 ,   ^ national aviation reporting center on anomalous phenomena united states naval flight surgeon's manual: third edition 1991: chapter 9: ophthalmology: perceptual disorders; naval aerospace medical institute ^ bertomen, lindsey (may 2007), "you strobe, i strobe, we all strobe together", law enforcement technology ,   ^ charles bovill obituary , the daily telegraph, november 2001,   [edit] see also air safety national transportation safety board [edit] external links flight safety f. cheap viagra online buy viagra for men viagra price lahore viagra drug interactions aspirin http://pelotazotaberna.com/umg-557501/ http://pelotazotaberna.com/umg-557362/ pelotazotaberna.com/umg-557622/ can viagra be bought over the counter in the uk http://pelotazotaberna.com/umg-558539/ pelotazotaberna.com/umg-556546/ side effects of mixing viagra with alcohol http://pelotazotaberna.com/umg-557627/