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Involutional Ptosis

Involutional, also referred to as aponeurotic ptosis, accounts for the majority of acquired ptosis encountered in clinical practice, and is defined as ptosis caused by levator aponeurosis disinsertion or redundancy but with normal levator muscle function, without any identifiable myopathic or neurogenic cause. It results from weakening and attenuation of the distal levator aponeurosis or less commonly to disinsertion of the aponeurosis. It is most often seen as an aging phenomenon, but also can be caused by facial trauma or as a complication of eyelid or orbital surgery. Surgical repair is achieved with shortening or reattachment of the aponeurosis.

Involutional ptosis, bilateral
Involutional ptosis after surgery
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