Sclera, The white of the eye, Gorilla. 鞏膜, 眼白, 大猩猩

Frans LantingSPL

Using the eyes to communicate is not a unique human ability (Credit: Frans Lanting/SPL)
BBC - Earth - There is something weird about this gorilla's eyes
http://www.bbc.com/earth/story/20150808-gorillas-with-human-eyes
The white around our eyes is called the sclera.
大猩猩也有與人類相似的眼白 - BBC 主页
http://www.bbc.com/ukchina/trad/vert_earth/2016/01/160122_vert_earth_gorillas-eyes

Sclera - Wikipedia, the free encyclopedia

鞏膜