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 Eye of the Sibyl The Eye of the Sibyl "The Eye of the Sibyl" is a science fiction short story by American writer Philip K. Dick. It was written sometime around 1975, but not published until 1987 when it was included in volume 5 (subtitled "The Little Black Box") of "The Collected Stories of Philip K. Dick", and has been reprinted since in other editions of this book such as the U.S. edition "The Eye of the Sibyl and Other Stories" . This is said to have been Dick's first piece of fiction for publication after his "2-3-74" experience that was the basis for