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
Diana Vreeland: The Eye Has to Travel Diana Vreeland: The Eye Has to Travel Diana Vreeland: The Eye Has to Travel is a 2011 documentary about the life and career of Diana Vreeland, a fashion legacy famous for her time at "Harper’s Bazaar" and "Vogue". The film was directed and produced by Lisa Immordino Vreeland (Diana’s granddaughter-in-law), Bent-Jorgen Perlmutt, and Frédéric Tcheng. It premiered at the 2011 Venice International Film Festival and the Telluride Film Festival. It has a total running time of 86 minutes, and can be seen with English, French, and Italian subtitles. The film features recorded audio and filmed interviews of Vreeland, as well