Hello,Thank you for your excellent question. This is one of the best questions I have answered. What I tell you is fact. I have been performing eyelid surgery for 17 years on a weekly basis on thousands of eyelids. Your eyebrow is an anatomical region. While it blends into your upper eyelid skin it is not a completely distinct landmark. Your eyebrow is based on anatomical location and skin thickness. Your eyebrow isn’t determined by where you might think hairs belong. If you have a ptotic (droopy) eyebrow, it is droopy by anatomy and you cannot truly raise it by tattooing it in a higher location. A person can be bald and I will still be able to measure appropriately the proper amount of upper eyelid skin that can be removed safely and effectively and provide the best cosmetic result even with the total absence of all hair on the eyebrow. As a matter of fact, if you place a permanent tattoo on your eyebrow before a blepharoplasty you may actually cause an aesthetic deformity postoperatively. If you microblade before surgery, you may easily place your permanent, tattooed eyebrow either too low or too high and probably too high. You should, without a doubt, wait until after an upper eyelid blepharoplasty to perform microblading. This question by far indicates to me how critical it is to choose your surgeon wisely. A professional eyelid surgeon will know exactly what eyelid skin can be removed, whether or not you have hair follicles or not. The presence of hair, unless maybe it’s poorly tattooed and your surgeon has to compromise the surgery, is a very small part in the incision placement or the removal of a certain amount of skin from your upper eyelids. It does not matter if your natural eyebrow hair is absent. A good eyelid surgeon knows where your eyebrow is located. Measurements are taken to the millimeter with a caliper. To give you a little more understanding, in general the vast majority of people have 30 mm of skin from the eyelashes to the lower portion of the eyebrow. You can take this measurement with or without hair. If you tattoo your eyebrow at 40 mm for example, because you think that is the correct position, you are going to wind up with an eyebrow that is too high. I hope this explains this situation. Get the eyelid surgery first then do the microblading and not the other way around. Trust your surgeon to know what he or she is doing. Your surgeon should explain this to you very clearly and if he or she cannot explain this to you then please go somewhere else. One more time, it doesn’t matter if your eyebrow is sparse. Good surgeons do not rely on your natural eyebrow hairs the way you are thinking.