Sclera nitrogenous sugar, hexosamine) to embed the fibrils. The cornea, unlike the sclera, has five layers. The middle, thickest layer is also called the stroma. The sclera, like the cornea, contains a basal endothelium, above which there is the lamina fusca, containing a high count of pigment cells. Sometimes, very small gray-blue spots can appear on the sclera, a harmless condition called scleral melanocytosis. Human eyes are somewhat distinctive in the animal kingdom in that the sclera is very plainly visible whenever the eye is open. This is not just due to the white colour of the human sclera, which many
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