In general, the weight loss center will let you look in the mirror and weigh yourself, and then help you implement the weight loss plan. This is the first step. The problem begins with this first step. According to an insider, the mirrors in general weight loss centers can be called "magic mirrors". They use the principle that concave lenses make objects wider, so that you can find that your body is more bloated than usual. When the weight loss plan ends, the beauty salon will do the opposite, replacing the concave lens with a slightly convex lens to make your body slim and slender.