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Whitnall’s ligament

A fibrous condensation running through the levator muscle that acts as a suspensory support for the upper eyelid. It also acts as a fulcrum for the levator muscle helping to transfer the vector force from an anterior-posterior to more of a superior-inferior direction. It is medially attached to the trochlea and superior oblique tendon. Laterally, it forms septae through the lacrimal gland and attaches onto the lateral orbital wall approximately 10 mm above the lateral orbital tubercle.

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