The main cause of the droopy eyelid after Botox or Dysport injections is the product diffusing into a muscle that elevates the upper lid. Though uncommon, it almost always is associated with injections into the brow area and not crow's feet. In fact, the main consideration for the crow's feet area is not too much brow elevation ("Spock brow.")
Greetings~ You shouldn't have to worry about droopy eyelids from Dysport in the Crows Feet. Droopy eyelids are the result of misplaced injections in the forehead generally, not around the sides of the eyes. The best way to prevent unwanted side effects is to choose your injector wisely. Experience is the key....regardless of the injector's title. Just because someone carried the title of physician or surgeon does not make them an instant expert on Dysport injections. Don't be afraid to ask questions about any procedures you're having or about someone's experience. Good luck~ Dr. Grant Stevens