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Catch light or catchlight is a light source that causes a specular highlight in a subject's eye in an image. They are also referred to as eye lights or Obies, the latter a reference to Merle Oberon, for whom the light was invented by then husband and cinematographer, Lucien Ballard. The catch light is either an artifact for a lighting method, or purposely engineered to add a glint or spark to a subject's eye during photography. The technique is effective in both still and motion picture photography; helping to draw attention towards the subject's eyes, which may otherwise get lost among other elements in the scene.
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