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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
In which type of ptosis the amount of ptosis decreases with mouth opening
assistant
The correct answer is  Marcus Gunn Jaw Ptosis (congenital synkinetic ptosis) In this condition there occurs retraction of the ptotic lid with jaw movements, because with stimulation of ipsilateral pterygoid muscle the levator palpebrae is also stimulated due to trigemino occulomotor synkinesis In the picture look that on opening of the jaw, ptosis has improved, this is typically marcus jaw winking phenomenon.