In the surgical correction of involutional entropion, addressing horizontal lid laxity alone may fail if which additional pathophysiological factor is not corrected?

• A Levator aponeurotic dehiscence
• B Hypertrophy of the tarsal plate
• C Overriding of the preseptal orbicularis over the pretarsal orbicularis ✓
• D Brow ptosis

Explanation

Involutional entropion results from four mechanisms: horizontal lid laxity, dehiscence of lower lid retractors, overriding of preseptal orbicularis over pretarsal orbicularis, and orbital fat atrophy. Addressing lid laxity alone risks recurrence if the orbicularis override is not corrected, for example by a transverse everting suture (Quickert suture) or Wies procedure.

Reference: Ophthalmic Plastic and Reconstructive Surgery, 2nd ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.