When babies make their grand entrance into the world, their visual resolution is one-fortieth of that of a normal adult. They lack depth perception. And their visual range is only about thirteen inches. The world is low-definition, two-dimensional, and only thirteen inches in diameter. Slowly yet sovereignly, the world begins to take on width and breadth and depth. By four months, a baby can perceive stereoscopic depth. By six months, visual acuity has improved fivefold. Their black-and-white world has burst into a kaleidoscope of colors, and they have volitional control of their eye
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