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EncyclopediaSeeAiry diskAiry disc
Airy disc (ār'ē), the image of a circular blur formed by a distant point source of light on the retina because of diffraction by the edge of the pupillary aperture where the diameter of the image decreases as the aperture increases.Airy disc (ār'ē disk) The image of a circular blur formed by a distant point source of light on the retina because of diffraction by the edge of the pupillary aperture where the diameter of the image decreases as the aperture increases. |