naturally occurring and / or modified clostridium neurotoxins , including those neurotoxins free of complexing proteins which naturally form complexes with clostridial neurotoxins , are used to enhance healing of injured surface or superficial tissue of a patient by local administration into or in close proximity to the injured tissue . such neurotoxins may be advantageously employed in wound healing and preventing scar formation , and find applicability in the area of ophthalmology , e . g . in treatment of injured corneal tissue , for example by closing inflamed eyes . a further embodiment includes diagnostic usage for the evaluation of effective toxin administration and medicaments for use therein .