The key is improper service, if the wax job is done properly then there's nothing to worry about. However, if the service is done incorrectly - waxing your eyebrows can lead to eye herpes and in extreme cases even blindness. The Oklahoma board of cosmetology has seen herpes cases sprout up in Midwest states - many directly associated with getting your eyebrows waxed at a location with poor sanitary conditions. The herpes virus can be transferred by using the same warmed wax on an infected customer as with others. Be wary of what spa you choose to have this service done at, ensure that all proper sanitary practices are carried out or your eyes may be at risk.