Human eye The upper end of the range is given in terms of normal visual performance as 10 cd/m (100,000,000 or one hundred million candelas per square meter). The eye includes a lens similar to lenses found in optical instruments such as cameras and the same physics principles can be applied. The pupil of the human eye is its aperture; the iris is the diaphragm that serves as the aperture stop. Refraction in the cornea causes the effective aperture (the entrance pupil) to differ slightly from the physical pupil diameter. The entrance pupil is typically about 4 mm in diameter, although it
Eye of the Beholder (film) Eye of the Beholder (film) Eye of the Beholder is a 1999 Canadian-British-Australian mystery thriller film that employs magical realism. The film, based on Marc Behm's novel of the same name and a remake of Claude Miller's 1983 French thriller "Deadly Circuit", is directed and adapted by Stephan Elliott. Starring Ewan McGregor and Ashley Judd, the film is an international co-production of Canada, the United Kingdom, and Australia. Stephen Wilson aka "The Eye" (Ewan McGregor) is an intelligence agent whose current assignment is to track down the socialite son of his wealthy boss and find out what trouble he has