Sclera Sclera The sclera, also known as the white of the eye, is the opaque, fibrous, protective, outer layer of the human eye containing mainly collagen and some elastic fiber. In humans, the whole sclera is white, contrasting with the coloured iris, but in other mammals the visible part of the sclera matches the colour of the iris, so the white part does not normally show. In the development of the embryo, the sclera is derived from the neural crest. In children, it is thinner and shows some of the underlying pigment, appearing slightly blue. In the elderly, fatty deposits on
The Mind's Eye & Mission of the Viyrans husband are causing problems to her domestic bliss. This story leads directly into the audio drama "The Bride of Peladon". The hallucinogenic plants in this story reappear in "Brotherhood of the Daleks". Mission of the Viyrans is a Big Finish Productions audio drama based on the long-running British science fiction television series "Doctor Who". It is a one-part story written by Nicholas Briggs and was released alongside a three-part story, "The Mind's Eye". The Doctor and Peri encounter the time travelling Viyrans on a holiday planet. "Mission of the Viyrans" completes the "Virus Strand" story arc, which also includes the