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
As Far as the Eye Can See actor Joaquin Phoenix. In 2008, the track "Light for the Deadvine" was featured in the penultimate scene of "Wilson's Heart", the season finale of the fourth season of the Fox medical drama series "House". Live keyboard player Ian Russell did not actually feature on As Far As The Eye Can See; he is not credited on the album's liner notes, and all keyboard parts on the album were played by Jones, Roberts and Williams. As Far as the Eye Can See As Far as the Eye Can See is the debut album of Welsh alternative rock band People in Planes