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The word carrom may be a shortening of and alteration of the French carambole and Spanish carambola, both referring to the red object ball in billiards, or by extension referring to carom billiards games as a class. The word ultimately originated in India; karambal is a name for the orange fruit, said to resemble a billiard ball, of the ...
In visual perception, flicker is a human-visible change in luminance of an illuminated surface or light source which can be due to fluctuations of the light source itself, or due to external causes such as due to rapid fluctuations in the voltage of the power supply (power-line flicker) or incompatibility with an external dimmer.
Players take turns flicking their discs from the outer edge of their quadrant of the board onto the playfield. Shooting is usually done by flicking the disc with a finger, though sometimes small cue sticks may be used. If there are any enemy discs on the board, a player must make contact, directly or indirectly, with an enemy disc during the shot.
Photopsia; This is an approximation of the zig-zag visual of a scintillating scotoma as a migraine aura. It moves and vibrates, expanding and slowly fading away over the course of about 20 minutes.
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Tiddlywinks is a game played on a flat felt mat with sets of small discs called winks, a pot, which is the target, and a collection of squidgers, which are also discs. . Players use a squidger (nowadays made of plastic) to shoot a wink into flight by flicking the squidger across the top of a wink and then over its edge, thereby propelling it into t
Visual snow syndrome (VSS) is an uncommon neurological condition in which the primary symptom is that affected individuals see persistent flickering white, black, transparent, or colored dots across the whole visual field. [7] [4] Other common symptoms are palinopsia, enhanced entoptic phenomena, photophobia, and tension headaches.
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." [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.