I have several chicken pox scars on my forehead and wonder if they will interfere with an endoscopic brow lift. Are the scars deep enough that they will prevent the skin from lifting around them?

While scars such as the ones you describe would not preclude you from undergoing an endoscopic brow lift, the surgery might not improve upon the appearance of those scars. Treatment options for those scars include injectable filler or laser resurfacing.