Search results
Results from the WOW.Com Content Network
The irises of human eyes exhibit a wide spectrum of colours. Eye color is a polygenic phenotypic trait determined by two factors: the pigmentation of the eye's iris [1] [2] and the frequency-dependence of the scattering of light by the turbid medium in the stroma of the iris. [3]: 9
The reduced eye is an idealized model of the optics of the human eye. Introduced by Franciscus Donders , the reduced eye model replaces the several refracting bodies of the eye (the cornea , lens , aqueous humor , and vitreous humor ) are replaced by an ideal air/water interface surface that is located 20 mm from a model retina .
A normal lens typically has an angle of view that is close to one radian (~57.296˚) of the optical system's image circle. [citation needed] For 135 format (24 x 36 mm), with an escribed image circle diameter equal to the diagonal of the frame (43.266 mm), the focal length that has an angle of one radian of the inscribed circle is 39.6 mm; the focal length that has an angle of one radian of ...