Asymmetries are small differences left compared to right of their face and body. One foot may be half a size larger or one eyebrow may sit a bit higher. These common symmetries of the face are challenging because you may not want to make one feature exactly the same as the other side. In just about everyone, one side of the face is more developed than the opposite side. The better goal is to match the proportions while considering the whole face. The eyebrows have many non-surgical options. Make-up and strategic plucking can make them more similar in shape and position. Some have tried Latisse to encourage growth in a sparse brow. Permanent make-up (tatooing) can make life easier. If the issue is brow position (one higher than the other), Botox can effectively shift one brow to meet the other by relaxing the muscles around the eyebrow. This may take an experienced injector and some experimentation to figure out the dose/injection sites. There are surgical procedures that can adjust the height of the eyebrows. This can be done through small tunnels and few incisions. Even an experienced surgeon may not get the eyebrows perfectly matched. Again, it's important to consider the proportions of the whole face. Craniofacial surgery to address your underlying bone structure is significantly more involved. There are risks to surgery too: nerve damage, scarring, bleeding, infection, hair loss. Lastly is one of the most important options: doing nothing. Your eyebrows may be a feature that is very noticeable to you and ignored by everyone else around you. I suggest consulting with a plastic surgeon who specializes in the face. Your doctor will examine you and review all the options to help you make an educated and safe decision.