Diaphragm (optics) the lens. The centre of the diaphragm's aperture coincides with the optical axis of the lens system. Most modern cameras use a type of adjustable diaphragm known as an iris diaphragm, and often referred to simply as an iris. See the articles on aperture and f-number for the photographic effect and system of quantification of varying the opening in the diaphragm. A natural optical system that has a diaphragm and an aperture is the human eye. The iris is the diaphragm, and the opening in the iris of the eye (the pupil) is the aperture. An analogous dev in a
Kick in the Eye (Searching for Satori E.P.)". The EP reached number 45 in the same chart. All tracks written by Bauhaus. Kick in the Eye "Kick in the Eye" is a song by English gothic rock band Bauhaus. It was released in 1981 as the second and final single from their second studio album, "Mask" (1981) and was released the following year as an EP titled Kick in the Eye (Searching for Satori E.P.). "Kick in the Eye" was released in March 1981 as the second single from the band's second studio album, "Mask" (1981). It reached number 59 in the UK Singles