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
Snow Flower and the Secret Fan (film) the Bund. Rupert Murdoch personally arranged for the film to be released by Fox Searchlight Pictures, which opened the film in North America on July 15, 2011.<ref name="http://www.movingpicturesnetwork.com/27627/summer-preview-2011-snow-flower-secret-fan/"></ref> The film received generally negative reviews from critics. On Rotten Tomatoes, it has a 21% approval rating, based on 87 reviews. On Metacritic, it has a score of 42 out of a possible 100, based on 31 reviews. Snow Flower and the Secret Fan (film) Snow Flower and the Secret Fan is a 2011 historical drama film based on the novel of the same name written by Lisa See. Directed by Wayne