Okay. A lot of other people have brought up this solution, and I thank them a lot since I also suffered from that same glitch a few days ago.

I thought it would be better to create a thread to explain it directly instead of having others search for the solution on other threads or create more of them.


So the eye glitch is a bug where the eyes and hair of your pony is the same color as your skin. I don't know why the hell this is happening, but it is simply due to the fact that you have a "." or some other symbol in your Steam profile name.
(It doesn't affect every symbol though.)

Just remove it and you should be fine. It might take a few hours to fix itself, especially on multiplayer servers. Just be patient.

Don't do what I did. I was so frustrated that I uninstalled Steam to see if it would get rid of the glitch. It didn't. Now I have to re-download over 100Go of games. :(