The eyes are the first of the five senses and the main visual function. Vision plays an extremely important role in people’s understanding of the objective world, and usually 90% of the information obtained from the outside world is done by both eyes. It is also an organ of expression, a monitor of the inner world of human beings, and can fully reflect a variety of inner activities such as joy, anger, happiness, etc., so it is called the window of the soul. It is the most visible and eye-catching organ in human appearance, and the eye is the first of the five senses, the main visual function. Vision plays an extremely important role in people’s understanding of the objective world, and usually 90% of the information obtained from the outside world is done by both eyes. It is also the organ of expression, is the monitor of the human inner world, can fully reflect the human joy, anger, enthusiasm, joy and other internal activities, so it is called the window of the soul. It is the most visible and eye-catching organ in the human appearance, is the center of beauty, known by aestheticians as the window of beauty, so a pair of beautiful and perfect eyes, in the human beauty often play a role of icing on the cake.