Asymmetric/uneven Eyebrows and Eyelid

Luckily, you included a photo without which all of us would just be guessing.  I definitely agree that your left brow is higher because you are unconsciously correcting for a subtle ptosis left upper lid.  You need to see an oculofacial specialist for further evaluation and treatment.

Although it is often difficult to say exactly from one still photograph, there are several different treatment options available. If ptosis of the left upper eyelid is present (which it appears to be from the photograph), then correction of this ptosis may result in the left brow coming down on its own over time. Botox injections are another way to even the brows and make them more symmetric. Finally, brow lifting techniques could potentially be helpful, but should be a last resort option in this scenario. See a facial plastic surgeon, oculoplastic surgeon, or plastic surgeon focusing on facial aesthetics for a consultation to help sort out the details and options.All the best,

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 on
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 cheekbones 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 the 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.