Disturbed sight, or disturbed reticle, is the circle which which forms the gunsight images in fighter and assault aircraft. The dot in the center of the reticle is known as the pipper, though can also be referred to as the reticle as a whole. Different reticles have different layouts. Conventionally a smaller circle sits within the outside reticle at one half radius point.
Early World War II and Korean War fighter sights displayed a geometric pattern of diamonds arranged around the pipper, sometimes referred to as a 'circle of diamonds.' Typically a sight control panel or a twist grip linked to the sight image allowed a pilot to adjust the range and wingspan selection of the reticle. With the introduction and advancements of computers the radicals began to compute range and superimpose the reticle over the target which calculating variables such as external ballistics.