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In reply
I appreciate Lemke's kind comments regarding our work on magnetic resonance analysis of dynamic eyelid anatomy. Lemke's compliments are particularly meaningful because they come from a renowned anatomist whose own contributions have made a significant impact on our thinking with respect to eyelid anatomy and physiology.The vast majority of eyelid scans have been performed in young, normal volunteers. Anyone with experience in eyelid surgery or cadaver dissection is aware of the involutional changes that characterize the older eyelid, particularly thinning and loss of elasticity in the support structures of the eyelid, including Whitnall's ligament, the levator aponeurosis, and the canthal tendons and associated retinacula. Our early experience in scanning older eyelids suggests that some of these changes may be identifiable on high-resolution magnetic resonance images, but more data will be necessary to evaluate and characterize these changes.Racial anatomic differences are beautifully demonstrated on high-resolution magnetic resonance