The Post-Levator Aponeurosis Fat Pad

Area of Science:

• Ophthalmic Anatomy
• Surgical Anatomy

Background:

• The post-aponeurotic space in the upper eyelid is a critical area for ophthalmic surgery.
• Accurate anatomical knowledge is essential for successful blepharoptosis repair.

Purpose of the Study:

• To investigate the post-aponeurotic space of the upper eyelid.
• To confirm and characterize the presence of a post-aponeurosis fat-pad.

Main Methods:

• An experimental anatomical study using 19 upper eyelids from 10 unembalmed cadavers.
• Transconjunctival dissection and histological examination of eyelid wedge excisions were performed.

Main Results:

• A distinct fat-pad was identified in the post-aponeurotic space of all studied eyelids.
• The fat-pad was predominantly diffuse in 66% of cases and located between Müller's muscle and the aponeurosis's posterior smooth muscle layer.

Conclusions:

• A consistent post-aponeurosis fat-pad exists between Müller's muscle and the aponeurosis's posterior smooth muscle layer.
• This finding provides essential anatomical detail for surgeons performing blepharoptosis surgery to avoid misidentification of tissues.