How can I correct my uneven eyes? One eye is noticeably smaller than the other especially when I smile.

Many different situations can lead to uneven eyelids. Some of these can be treated non-surgically and conservatively, even using some very advanced injection techniques with filler or very precise placement of Botox. Some situations truly do require surgery to resolve. 
It is important that you seek a consultation with an eyelid expert to delineate the exact cause and treatment options.
To ensure you are receiving the highest level of care, seek out a modernly trained, new-school dermatologic surgeon, oculoplastic surgeon, facial plastic surgeon or plastic surgeon who is board certified and fellowship trained in one of these "core four" cosmetic specialties. Membership in organizations like the American Academy of Facial Plastic and Reconstructive Surgery help to identify a highly trained surgeon.
Cameron Chesnut
#realself500 Physician

It's difficult to say without the benefit of a formal evaluation. This is my expertise and a huge portion of my practice. Asymmetry is normal and expected. See an expert who does facial shaping with surgical and non surgical methods to get a comprehensive option. Best, Dr. Emer.

It is often very difficult to fully evaluate orbital or eyelid asymmetry based on photos alone. In some cases, the visible differences might be due to ptosis or drooping of the upper lid, while others might be due to genetic brow asymmetry or bony orbital asymmetry. Some of these can be corrected with non-surgical intervention such as Botox injections, while others might require surgery to improve. In many cases, there might not be a need for any treatment at all. 
Be sure to see an expert for an in-person exam.
All the best,

The eyes are the most common place to have asymmetries. There are some main causes that most patients fall into. This is in no particular order. You will need a good facial analysis to determine as some of this is dynamic and needs to be assessed with movements.1. Hypoplastic maxillary sinus (the eye then sits deeper in the eye socket giving a smaller appearance to the eye). This is not a medical problem but is important if you were to have sinus surgery2. Upper lid ptosis (weakness of the muscles that open the upper lid). To diagnosis this we would need to see you in clinic. 3. Brow ptosis (weakness of the muscle of the forehead which lifts the brow. This then leads to the upper lid being lower than it should be.For you it is hard to tell exactly with still photos. The fact that it worsens when you smile makes me lean towards a muscle weakness/neural issue but again a good physical exam and facial analysis is required. Hope this helps.Best of luck,DrC

There are multiple anatomic abnormalities that can result in facial asymmetry. These may include deformities of the orbital bones, eyelid soft tissue and eyebrows. In most cases, they are relatively minor, but in some cases, they may be severe and extremely noticeable. Depending upon the deformity, treatment may or may not be possible. Although it's hard to tell exactly what's going on from your pictures, I suspect you have boney orbital asymmetry. It appears that on the side of your lowered brow, you also have a depressed orbital rim and flattened cheekbone.Asymmetry of the facial bones can be a major contributor to facial asymmetry. When this occurs, it's not unusual to have one side of the face that has a depressed orbital rim and flattened cheekbone and an eye that appears smaller than the opposite side. This is often related to a condition called plagiocephaly.When this situation arises, it's possible in some cases to disguise asymmetry. Unfortunately, it's not possible to correct this deformity without major surgery. In this case, a unilateral brow lift in combination with Botox on the opposite side are both possible options. If you're considering treatment, it's important that you meet with a board certified plastic surgeon who can help you with this decision.