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 Heron The Eye of the Heron The Eye of the Heron is a 1978 science fiction novel by American author Ursula K. Le Guin which was first published in the science fiction anthology "Millennial Women". "The Eye of the Heron" is a science fiction novel set on the fictional planet of Victoria in a speculative future, probably sometime in the 22nd century, when the planet has been colonized for about a century and has no communication with Earth. The protagonist is a young woman called Luz but the story is told in the third person and the reader sees events from