At a glance these pictures may look like a photographs, but look closer.

Illustrator Jose Antonio Lopez Vergara spends about 20 hours over three days to draw super-realistic eyeballs. The 19-year-old's attention to detail allows his drawings to look like the real thing.

The complexity of the human eye inspires Vergara. "I've always loved to work with details, and drawing eyes seemed like the perfect challenge," Vergara tells Mashable. "It takes patience and practice to make a realistic drawing; it is very important to spend a lot of time getting the proportions right before adding color."

Open your eyes to more of Vergara's work on his Instagram and Facebook pages.