Vision, the most important function of the eyes, is the key to observing the shapes, the colors, and the beauty of the world. We see the world through our eyes, and the vision makes the world open to us. However, the eyes are vulnerable as well. They can be affected by aging or diseases, which would lead to vision loss or even blindness. In this case, caring for the eyes and the vision every day could somehow guarantee we stay in touch with the beautiful world.