One eye is bigger than the other? (photos)

I recommend that  you first  rule out any thyroid hormone abnormalities. Eye lid retraction  is often an early sign of thyroid imbalance. It is best to see your primary care doctor to get the appropriate  blood tests to rule this out.  From a strictly cosmetic perspective, I have found that ultra small dosage of 1-2 units of Botox to the  lower and upper eyelid  of your right eye, will alleviate some of the tightness of the orbicularis oculi muscle. A tense  muscle in this area can cause the eye to appear small and squinty, compared to the  opposite eye.  This is a simple, but temporary, way to make the right eye appear more open and symmetric the  left eye. I recommend this be done by a board certified  plastic surgeon or oculoplastic ophthalmologist , who can evaluate you and see if Botox  is appropriate for you based on a thorough history and physical exam.Prashant Soni,M.D.

In your case I recommend a personal review from a PS with an interest in oculoplastic surgery. It is impossible to make an accurate diagnosis from the image alone, and a careful assessment in person (with or without scans) is important. Good luck! 

Silent Sinus Syndrome is when one sinus is smaller than the other. That is the most common cause for what you are experiencing. There is really no treatment for that other than an orbital plate placement, which we typically use for fractures. I do not recommend this in your case. BestDrC

There are many reasons your eyes could be slight different sizes, it is also normal to have asymmetrical features on your face. With that being said, botox can be placed to change the shape of the eye. I would recommend seeing an oculoplastic surgeon to evaluate you in person. Hope this helps.  

I think the problem may be the left side with left upper eyelid retraction or bulging eye but it could be from the right side. See video below and see an oculoplastic specialist for evaluation.