Wondering how Spider-Man squints while wearing a mask?

The friendly, neighborhood superhero's appearance in the latest "Captain America: Civil War" trailer has everyone talking—and sometimes for very specific reasons, like Spider-Man's "eyes."

Fans cheered as Peter Parker swung across the screen in his suit, but many wondered: "How can he squint if he's wearing a mask?"

Spidey does squint in the comic books, but it's unclear how. In the trailer, it seems that his eyes have "shutters" that decrease the width of the white area.

An earlier report described the eyes as "mechanical" and "emotive" like in the recent comic book movie "Deadpool." The mechanism possibly allows Spider-Man’s vision to zoom in and out. This supports the theory that Tony Stark will be providing technology for the young hero, which may also be part of the reason why he chose to side with the billionaire adventurer. — AT, GMA News