Ive been noticing my friend's eyes have grayish colored areas on the scleras, mostly underneath her eyelids. There isn't much of anything too close to the iris, but you can clearly see the gray areas when she rolls her eyes around or if you look under her eyelids. I first noticed them about a month ago, and they're still there. However, she doesn't complain about any pain, vision problems, or anything like that. So I was wondering if this sounds like something serious that we're missing, or could it just be along the lines of something simpler like proper diet?