Corn tortillas can be a giant pain to work with though -- if you use them straight from the bag, they crack and fall apart. Some people microwave them to soften them, but I think the most traditional way of softening corn tortillas is by frying them in a bit of oil for a few seconds.
Definition of SCLERA. : the dense fibrous opaque white outer coat enclosing the eyeball except the part covered by the cornea â see eye illustration. â sclerÂ·al \-Él\ adjective. See sclera defined for kids. ADVERTISEMENT.
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.he thickness of the sclera varies from 1mm at the posterior pole to 0.3 mm just behind the rectus muscle insertions. The sclera's blood vessels are mainly on the surface. Along with the vessels of the conjunctiva (which is a thin layer covering the sclera), those in the episclera render the inflamed eye bright red.