Originally by LianaSV, remixed to correct a few spelling errors and in one case clarify the explanation a tiny bit Note: This is not to be rude, it is for the OP (LianaSV) to see the changes and, if they so wish, add them to their post.
The Sclera is the part of an eye that, in a healthy human and many other animals, is white. A dragon's sclera is yellow to orange, in many cases.