One reason is because you are accustomed to seeing oneself in the mirror, and any asymmetry appears natural to you. When you look at a photo, it's been flipped, so you're seeing not only a deviation from symmetry, but a divergence in the other way of what you're used to seeing. As a result, you appear even more asymmetrical.
The other reason is that we know how we look based on how we feel. If you feel great, you'll look great. If you feel sick, then you'll look sick. So if you think you look fine, but inside you're feeling awful, then you probably do look this way too.
Finally, our brain plays a huge role in determining how we feel and therefore how we present ourselves. If you constantly tell yourself that you don't look good, then over time that belief will become true.
There are two ways to go about changing how you look: using makeup or getting plastic surgery. Both can help you look more attractive by creating a more perfect balance between your head and your body, but neither is completely free of side effects. Let's take a look at each option in more detail.
A mirror does not reflect how you seem in real life. This is because your brain reverses your reflection in the mirror. When you raise your left hand, your reflection does the same. Our features are not symmetrical, from the way we grin to the way we split our hair. So when you look into a mirror, it is like looking at a picture of yourself with your brain reversed.
Mirrors were originally made out of polished metal plates with a glass pane attached to them. Today's mirrors can be made out of many different materials including plastic and copper.
Although you see only one side of your body in a mirror, both sides are perfectly healthy. Brain cells on the other side of the skull process what you see in the mirror, so there is no need for you to worry about them.
Your image in the mirror is just a copy of what's inside your head. The original may not be exactly as you think it is; sometimes it's darker or lighter than expected. But the mirror image always stays true to type. So if you have dark hair, then you will see yourself as having dark hair in the mirror. It doesn't matter what color clothes you wear or how you style your hair, you will still look like you have dark hair in the mirror.
People use mirrors to check themselves out every day.
Except for being inverted, both (mirrors and photographs) are correct. The mirror or camera have no effect on the appearance: it is the perceived distance from the camera to what the camera sees that does. Because your head and body are three-dimensional objects, they seem differently whether seen up close and from a distance. When you look in a mirror, you see yourself as if through a window. The window can be partly open, so you also see any scene behind you.
When you photograph someone, they appear as they really are, not as you imagine them. People don't look their best when photographed, because facial expressions aren't always natural. Facial features such as wrinkles are visible when you photograph someone side-on, but not when you photograph them straight on. The camera doesn't change this fact; it's a three-dimensional object with depth. A photograph isn't perfect either; light leaks around the edges of some photos, and there may be some noise in others. These effects don't change the fact that photographs are three-dimensional objects with height, width, and depth.
Mirrors do change the truth about people's appearances. If you look into a mirror and notice that you have a bad hair day, you might decide to skip school or work to go shopping for new clothes. Your teacher might call in sick because she looks terrible in class! Although this sort of thing rarely happens, it can if you're not careful.