Sclera

The sclera is the white part of the eye. Unlike most animals' eyes, the human eye's sclera is pale. This makes it easier for us to see where other people are looking. For most mammals, the sclera is the same color as the iris.

↑ Romer, Alfred Sherwood; Parsons, Thomas S. (1977). The Vertebrate Body. Philadelphia, PA: Holt-Saunders International. p. 461. ISBN 978-0-03-910284-5.{{cite book}}: CS1 maint: multiple names: authors list (link)

[1] Romer, Alfred Sherwood; Parsons, Thomas S. (1977). The Vertebrate Body. Philadelphia, PA: Holt-Saunders International. p. 461. ISBN 978-0-03-910284-5.{{cite book}}: CS1 maint: multiple names: authors list (link)