Lisa, the change in sclera is just to the outside of the thin blue line called the corneal limbus. The sclera is brown on my chestnut & the patch of opaque color is just to the outside of this limbus line. It's about the size of the tip of my pink finger. I sent a picture of it to my local vet & she didn't have any concern unless the condition should change & show any signs of unlceration (none now). I may try to figure out how to send the picture to the ECIR group if technology allows.
Shari ,Fly Free Snickers mom
Western Wa state