We are sensitive to small differences in the appearance of our eyes, but in fact, everyone is asymmetrical, some more so than others. The bony orbit may be further from the midline, higher or lower from one side of the face to the other, and one side of the face may be wider than the other side, and this can vary from the top to the bottom.
Taking normal asymmetry and trying to change it does not work. Accepting one's normal features and gradually desensitizing one's self to any asymmetry allows healthy growth and maturity. Being sixteen seems to magnify all these concerns, but eventually they go away.
Facial asymmetry is extremely common, and especially eye asymmetry. You have very mild asymmetry in that your right eye seems slightly larger then left. That could be due to a variety of factors, such as eye position, eye socket size, or eyelid droop.
Your asymmetry is extremely mild and only you, and some trained professionals are likely to notice it.
As other experts have noted, this is a normal phenomenon in teens as they are becoming more body conscious.
Considering how mild your asymmetry is, I would not recommend any sort of surgical intervention!
We get this question daily and it is almost always from teens. That makes sense because those are the worst years for body image. I have yet to see a patient that didn't have one eye bigger than the other or some other type of difference. Go through the photos of the beautiful people in those magazines by the grocery checkout counter and you will see what I mean.