X-No-Archive: yes
This is perhaps one of the strangest topics which scores about a 20 +
on the weirdness scale of 1 to 10.
First, we should take a brief look at some of the characteristics of
the human eye as to what's normal and what isn't. The white part of a
human eye is called the sclera, which comprises 5/6 of the outer
surface of the eye. The sclera is a very thin tissue made of several
layers, with a total thickness varying between .3mm and 1mm thick
depending on where on the eye it's measured.
<http://rense.com/general81/blak.htm>