Is There a Procedure to Get Thicker Eyebrows?

At my practice in New York, I offer eyebrow transplant for thin eyebrows as well as for replacing lost follicles due to trauma. For eyebrow transplant surgery, the donor area comes from either your scalp or your leg. The donor is usually taken from a site that furnishes finer rather than coarser hair; finer hair is a better “match” for eyebrow hair. Those follicles are individually separated and placed individually in a pattern that gives a contoured, natural look. Like all hair transplants, these newly placed follicles will most likely go dormant for a while after surgery and will not start to grow until approximately 4 months later. These hairs will need to be trimmed on a regular basis as they retain the same growth characteristics as the donor site. The link below shows more info...

Hello,Eyebrow transplantation takes a special set of skills.  We are unique in the sense that we will do off-label use of ARTAS for eyebrows to get quality grafts for transplantation.  The key with eyebrows is to ensure that the implanted hairs follow the natural direction of the eyebrow.   
There are various methods to thicken eyebrows:
Latisse- off label use has reportedly helped some patientsEyebrow transplantation- We use FUE (off-label use of ARTAS) with regenerative techniques to ensure healthy looking browsMicroblading- Tattooing of the eyebrows which lasts between 6 months to a yearBest,Anil Shah

Hair transplant to the eyebrows is an excellent option for improving hair density to the eyebrows. This is commonly performed for scars, asymmetry, or just to increase fullness. I always recommend seeing a fellowship-trained hair restoration surgeon, particularly for eyebrow transplant, as this is an advanced technique.
All the best,