Shingles of eyes is a very serious eye disease, which might lead to permanent vision loss finally. It is called herpes zoster ophthalmicus, infected by herpes zoster virus. At the very early stage, you might get fatigue and continuous fever without other reasons, and then it will break out. Seeing your doctor and getting proper treatment is highly recommended. Doctor might prescribe you some antiviral medication and steroids eye drops to help recovery. I know it is rather painful and itching, but you need to control yourself not to rub or scratch the lesion otherwise worse infection or scar might be caused. You should keep the infected area clean. Normally it can last anywhere from one month to several months, even years. Take a good care of it and get proper and timely treatment could accelerate the process of healing.