A complete exam with an oculoplastic surgeon, as well as a possible CT-scan to follow will help determine which eye is problematic. If the problem is in your left orbit, a thyroid orbitopathy that causes eye muscles to increase in size or orbit fat to increase in volume is the most likely diagnosis. Other possible orbital problems include a mass pushing the eye forward making it look bigger. If the problem is in your right orbit, your surgeon will look for something that causes the eye to sink back such as an old undiagnosed orbital fracture. If the eye is the problem, it is because of a different eye size on one side. A near-sighted eye (myopic) would be larger making it look bigger, which is possibly the case on your left side. If eyelids are the problem, eyelid retractions make an eye look bigger (as on your left side) wile a droopy upper eyelid (ptosis) makes an eye look smaller (as on your right side). Of course, a full exam with glasses off would help differentiate these various causes. Most of these possibilities are treatable medically or with orbital or eyelid surgery and yes, it is possible to make your eyes look more symmetrical. Good luck!