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
Love Has a Name the first preorder single from the album. "Love Has a Name", which featured Kim Walker-Smith, was released in July 2017 as the second preorder single from the album. "Flood the Earth" featuring Katie Torwalt was the third song to be availed for instant download, followed by "Make Us One" featuring Chris Quilala being released in August 2017 as the fourth and final preorder single from the album. The studio version of "Love Has a Name", featuring Kim Walker-Smith was released on October 6, 2017 as the lead single from the album. The week ending September 2, 2017 saw the sale