Catch light

Catch light or catchlight is a light source that causes a specular highlight in a subject's eye in an image; the term may also refer to the highlight itself. 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.