Humans rely on their sense of sight to move in their surroundings. Of the five senses, it is probably the one most used and relied upon by people, day-to-day, moment-to-moment, especially in our modern multiscreen world. In this enlightening resource, readers discover how the eye works, how images are focused on the retina, and how nerves relay signals and impulses to the brain for processing. They get not only in-depth explanations of the parts of the eye and how they function, but also detailed images of the eye's anatomical structures. In addition, common eye problems and disorders, such as myopia, hyperopia, astigmatism, colorblindness, glaucoma, macular degeneration, cataracts, and blindness, are examined.