Eyebrow transplantation can lead to dramatic transformation in facial appearance. However, it is a small area to be covered but it requires a lot of expertise to give perfect shape, direction and curl to have a completely aesthetic transformation. Dr. Jyoti Gupta, explains about the art and science behind the eyebrow transplantation in this video.
Reference: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5561712/