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 Giant wasteland as the Constitution begins to warp into a monstrous living being. The contents of the ampoule have merged Nancy, Brokk's eye, and the organic components of the ship itself into a voracious living entity, part animal, part vegetable, and part mineral; the transition has driven the new entity insane, and it will consume all life on Earth. The Doctor is unable to fight this new life form, and when Liz and Osgood try to cut it to pieces using the time bridge, the pieces reconstitute on the other side and attack them. They are forced to flee beyond the