As one of the most vital of our five senses, our eyesight is perhaps the one we humans rely on the most. Our eyes are incredibly complex organs that evolved over thousands of generations from a simple eyespot to a complex eye with a primitive lense.
Eyes collect massive amounts of information from colors and shapes to sensing light levels, depth, and motion. Although human eyes are truly spectacular, they are not the pinnacle of eye evolution (especially compared to many birds of prey or the mantis shrimp.)
So how did the eye evolve? This infographic sheds light on the subject.