Thank you for your question. This happens when the lower eyelid is overly injected or Botox is injected into a patient who already has relax eyelids. A snap test should be done before receiving injections in this area. Unfortunately, there is no way to reverse Botox. It will take 3-4 months to wear off. In the meantime make sure you keeps your eyes moist to prevent drying of the cornea. If you still have concerns I recommend contacting an expert injector.
If the problem is due to the Botox it will take a few months to wear off; however, the main issue is going to be very dry eyes because they are not properly lubricated. Do not use Iopidine eye drops--that will make it worse. You need moisturizing drops such as ophthalmic saline without preservatives and you should see a board certified ophthalmologist