What is best for a 77 year old woman Fraxel or halo?

The best laser depends on the particular concerns you have for your face.  If you are seeking to rejuvenate the face, I like fraxel dual because it also addresses sun damaged areas, hyperpigmentation, and fine lines/wrinkles.  Also don't forget to ask who is administering the laser treatment.  Please consult with a board certified specialist who can assist you in achieving the results you seek. 3-dimensional computer imaging can help you visualize what you may look like afterwards and serve as an important communication tool with your surgeon

I have offered Fraxel for several years in my practice and it is my go to device for non-ablative skin resurfacing. The technology has been around for over a decade and is safe and effective. I cannot comment on Halo since it is a newer device that I chosen not to offer at my practice. I see no need to add it to my practice given that Fraxel still provides my patients with amazing results. In your search, look for a Fraxel Dual provider. The two wavelengths on the newer Fraxel device are great for addressing fine lines and wrinkles and pigmentation.