This furry critter likes to keep its eyes open even when it’s asleep! And when you’re a cute, cuddly but relatively defenseless guinea pig, that’s probably a good idea. As adorable as they are, guinea pigs also have some habits that might seem a little icky – like extruding a milky white substance from their eyes, which they then use to groom themselves. Something you might not want to think about the next time you’re petting one…  

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Yohani Kamarudin - Photo by Suren Manvelyan

Read more at http://www.environmentalgraffiti.com/animals/news-incredible-beauty-animal-eyes-macro?image=12#PMdhM7He4oFXZ5Oh.99