When shooting a selfie or photograph, the angle and perspective of the photograph have a significant influence on the photograph. A little shift in angle can distort your face, making it appear different than it is. In certain circumstances, the focal length of the camera and the focus length of our human eyes disagree, resulting in a distinct depth in our faces. For example, if you focus on something far away from you with your camera's zoom lens set to 200mm then move closer to that subject until its image fills your screen, you'll see that it doesn't come out to be 200mm wide - rather, it appears much shorter because your camera was not focused at 200mm away from you. Similarly, if you focus on something close up and then move farther away from it until its image fills your screen, you'll see that it gets larger and larger until it reaches full width when you stop moving away from it. This is because the focal length of your camera is not 200mm but rather less than that due to the narrowness of its lens. If you zoom in on an area of interest on your photo, such as your face, you'll see that it looks distorted compared to other parts of the picture. This is because your face is not at a distance of 200mm from the lens but rather closer than that. The further away objects are from the lens, the smaller they look in comparison. This is true even if you're not moving!