Abstract: A device to assist in the reading of an illuminated image is disclosed. The device comprises a blocking member including a plurality of blocking portions pivotally mounted together at a common pivot point so as to be pivotable between a storage position and a use position. Each blocking portion has a distal end, the distal ends of the blocking portions defining a curved edge of the blocking member when the blocking portions are disposed in the use position. The blocking member is at least partially opaque for placement over a portion of the illuminated image to block at least a substantial portion of the illumination light. The curved edge is sized so as to approximate the size and shape of a portion of the illuminated image. The device has particular utility with breast X-ray film and CRT images, including such images where breast implants are present. Two embodiments of the device are disclosed, along with a related method.