OP2.2 | Lid and Lacrimal Procedures: Bell Phenomenon, Ptosis Evaluation, Massage and Epilation — Summary & Reflection

KEY TAKEAWAYS

This module has covered four supervised lid and lacrimal procedures. Bell's phenomenon is a protective eye-rotation reflex assessed before lid surgery — positive means protective globe rotation; negative means cornea is fully exposed with any lid-gap. Ptosis evaluation requires three measurements: MRD-1 (normal 4–5 mm; reduced by ptosis), levator function (poor <4 mm → frontalis sling; fair 5–11 mm → resection; good ≥12 mm → aponeurosis repair), and upper lid crease height. Crigler's massage for CNLDO applies firm downward pressure over the lacrimal sac fossa (not the nasal bridge) 4–6 times daily from birth to 12 months; probing is performed if unresolved. Epilation uses fine-tipped forceps to extract individual misdirected lashes at the slit-lamp; permanent ablation by electrolysis or cryotherapy avoids repeated treatments. The clinical value of each procedure lies in interpreting the finding — not just performing the technique.

REFLECT

Consider a scenario where you are teaching Crigler's massage to a mother in a busy district OPD. What would you demonstrate versus just describe? How would you check that she has understood the correct technique before she leaves? Reflect also on the challenge of performing ptosis surgery when Bell's phenomenon is negative — how does this change the conversation you have with the patient and family pre-operatively? What does this tell you about the importance of assessment preceding any intervention?