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
The Eye (2008 film) The Eye (2008 film) The Eye is a 2008 American supernatural horror film directed by David Moreau and Xavier Palud, scripted by Sebastian Gutierrez, and starring Jessica Alba, Parker Posey, Alessandro Nivola, and Rade Šerbedžija. It is a remake of the Pang Brothers' 2002 film of the same name. Sydney Wells is a successful classical violinist from Los Angeles who has been blind since she was five years old, caused by an accident with firecrackers. Fifteen years later, after celebrating conductor and pianist Simon McCullough's birthday during rehearsal, Sydney undergoes a cornea transplant, which causes her eyesight to return, a