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Healthy Body
OWNER’S MANUAL
Listen to Your…
EYES BY SARA ALTSHUL
ILLUSTRATIONS BY MARK ALLEN MILLER
CORNEA Directs light onto the lens and does most of the focusing for you.
IRIS Your iris has a pattern utterly unique to you—that’s why there has been so much interest in iris scanners as security tools.
DECEMBER 2015
VITREOUS
LENS Converges light to be passed to the retina. When light goes through a convex lens, the image gets flipped. Technically, you see things upside down, but your brain turns them right side up.
This is your eyeball’s transparent, gel-like filling. It carries light to the retina.
OPTIC NERVE Sends signals from the retina to the brain via more than a million fibers. That’s why an entire eye can’t be transplanted; it’s impossible to surgically attach all those connections.
