The eye and brain are among the first organs to develop during pregnancy, because they are so complex and control the whole body. The eye is a bit like the camera on your smart phone. It can see and create images that are sent to the brain, and forms memories of colors, faces, numbers, letters, words and objects.
What’s more, the eye has many of the same kinds of working parts as a camera. A lens and tiny muscles for focusing, a retina for forming an image, and a nerve fibre (a bit like a USB cable) for sending the information back to the brain. Plus, there are two eyes that work together, allowing vision in 3D.
From birth, infants have a fully developed eye, with all the required parts, but it isn’t yet fully functional. Until about 4 months, they can follow basic shapes, but their vision is still blurry and short sighted. By 5-8 months, they learn how to grasp objects and see clearer, near and far, in 3D, in color, and even in the dark .