Diaphragm (optics) curved blades improve the roundness of the iris opening. In a photograph, the number of blades that the iris diaphragm has can be guessed by counting the number of diffraction spikes converging from a light source or bright reflection. For an odd number of blades, there are twice as many spikes as there are blades. In case of an even number of blades, the two spikes per blade will overlap each other, so the number of spikes visible will be the number of blades in the diaphragm used. This is most apparent in pictures taken in the dark with small
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