Surgery to Balance Eye Shape?

 Maybe right and left are reversed in the photo, but you seem to have ptosis (pronounced "tosis") of your left upper eyelid.
You should consult a board certified ophthalmologist or oculoplastic surgeon to determine the cause, and to discuss possible repair. 
Good luck, and best regards.

It's not unusual for patients to have some degree of orbital asymmetry. Unfortunately, the degree of orbital asymmetry that you describe is definitely abnormal.The presence of progressive unilateral bulging of the eye should definitely be evaluated by a surgeon with experience in this area. This problem can occur for a variety of medical reasons including thyroid disease and tumors. For this reason, an evaluation should be performed as soon as possible. Under these circumstances, imaging studies including CT scans may be necessary.Depending upon the cause of the problem, a variety of treatment options may be available. In some cases, expansion of the boney orbit may be necessary to accommodate the globe.Irregardless of the causation, it's important to consult a board certified plastic surgeon with experience dealing with this type of problem. This surgeon should be able to formulate a treatment plan that addresses your anatomic findings and achieves your aesthetic goals.

The left upper eyelid appears to be ptotic. An oculoplastic surgeon can correct this problem with one of a few surgical options. In office evaluation is necessary to determine the appropriate course of action. 

Hi LisaLatina,
You appear to have ptosis of your left upper eye lid.  You should consult with the best opthalmo-plastic surgeon you can find who has experience in ptosis correction.
When performed properly, the results are symmetric and beautiful.  Good luck and be well.
Dr. P

Dear Liz
It is interesting that you feel that your left eye is bigger than your right eye. What you are seeing is a larger left upper eyelid platform-the space between the upper eyelid lashes and the upper eyelid sulcus.
The real problem here is drooping of the left upper eyelid. This condition is called upper eyelid ptosis. It is likely that there is slippage of the left upper eyelid tendon insertion called the levator aponeurosis. Fixing this involves opening the eyelid and reattaching the insertion of this tendon. Interestingly when this is done fat is often brought done into the upper eyelid sulcus with this procedure helping to make the subbrow area look more full as well. Please recognize that it is possible that there may also be a degree of the same issue in the right upper eyelid.
This is assessed at the time of a detailed eye plastic surgery consultation. Because of the specialized nature of your problem, you are best seeking care with a fellowship trained eye plastic surgeon. The American Society of Ophthalmic Plastic and Reconstructive Surgery maintains a website that lists this specialists by region to assist you in finding someone: ASOPRS.org

There are some very noticeable asymmetrical differences in both eyelids according to the picture that was shown. The small amount of ptosis on the patient’s left eye could be addressed by opening the eye more to partially be more symmetrical to the right eye. Additionally, fat grafting through the upper lid orbital sulcus can be performed to give more fullness. It is impossible to get both of these eyelids to be perfectly symmetrical.

Eye asymmetry is normal. Yes, I see from the photos that the left eye has a higher lid fold. This may be related to eyelid ptosis and its ability to raise your eye lid. Or it just may be normal differences between the two sides. It is best to be examined to make sure that this is not the case. If it is, then better symmetry can be achieved with surgery to correct this problem.

In nature there is no such thing a perfect symmetry. Just like it is common to have one breast larger than the other or one leg longer, this can happen with your facial skeleton. The boney orbit or eye socket, around your left eye is probably more shallow than the right one. Because you said this is something that you did not have when you were younger, there is a small chance that you have developed a slight degree of exopthalmus or prominence in this eye and you may want to be seen by an Ophthalmologist to rule this out. If your problem is just an cosmetic one, I would not recommend surgery. You have pretty eyes that are almost the same.

The first step is to determine why your eyes are different shape, especially since you feel it has changed. You should be evaluated by a specialist in Oculoplastic surgery or Facial Plastic Surgery. There are many possible causes of the changes you are seeing--eyelid muscle weakness, changes in the size of the eyeball, changes in the bone of the eyesocket, tumors or growths in the eyesocket etc.
Evaluation may involve CT scans of the eyesocket or other testing. Treatment is entirely dependant on the diagnosis. I urge you to have this evaluated by a specialist as soon as possible.

As you can tell from the other answers, you appear to have a condition called "ptosis" (pronounced tosis) of the left upper lid.  Generally an ophthalmologist who specializes in eyelid surgery is best to fix this problem and make your eyes look more symmetrical.