A 58-year-old woman who has worn rigid contact lenses for thirty years notices her right upper lid has gradually drooped over two years. Her vision is fine but she looks “tired”, and the lid feels heavy by evening. There is no double vision and no fluctuation.
Examination Findings
Right upper lid ptosis of 3 mm with a high or absent lid crease and good levator function (12 mm). The lid everts easily and the tarsal plate feels thin. No fatigability, pupils normal, eye movements full. The picture is classic for aponeurotic dehiscence, plausibly related to decades of lens handling.
Investigations
Levator function and lid-crease height measurements characterise the aponeurotic pattern (good function, high crease). Fatigability testing and variability history exclude myasthenia. Pupil and motility examination excludes neurogenic causes. Photographs document symmetry for surgical planning.
Questions to Think About
- How does long-term contact lens wear contribute to aponeurotic ptosis?
- Why does good levator function change the surgical plan?
- What distinguishes this from the ptosis that needs urgent neurological workup?
Diagnosis
Aponeurotic ptosis (levator dehiscence) associated with long-term rigid contact lens wear.
Reasoning
Reasoning: Gradual ptosis with preserved levator function and a high crease is aponeurotic dehiscence — the levator aponeurosis has slipped or thinned, a known association with chronic rigid lens wear and eye rubbing. Diagnosis: aponeurotic ptosis. Management: typical management is levator aponeurosis advancement (reattaching and tightening the slipped tendon), which works precisely because the muscle itself is healthy. She is counselled that this is mechanical, not neurological, that surgery addresses lid height (not vision, which is already good), and that gentle lens handling reduces recurrence risk.
Differential Diagnosis
- Aponeurotic (involutional) ptosis — favoured: gradual onset, good levator function, high crease, long-term rigid lens wear.
- Myasthenia gravis — ruled out: no fluctuation, no fatigability, no diplopia.
- Horner syndrome or CN III palsy — ruled out: pupils normal, motility full, no anhidrosis.
Management
Typical management includes levator aponeurosis repair/advancement via an eyelid-crease incision, with intraoperative adjustment of lid height and contour. Pre-operative counselling covers the cosmetic-functional nature, symmetry goals, and risks (under/over-correction, dry eye, contour irregularity). Post-operative care includes lid hygiene, cautious lens-wear resumption, and advice on gentle lens insertion and removal.
Key Learning Points
- Aponeurotic ptosis = the levator TENDON slipped, the MUSCLE still works — hence good levator function with a high lid crease.
- Chronic rigid contact lens wear and eye rubbing are recognised contributors via repeated lid traction.
- Good levator function means levator ADVANCEMENT surgery works well — reattach the tendon, don’t bypass it.
- Gradual, non-fluctuating ptosis with normal pupils and motility is mechanical until proven otherwise — but sudden or variable ptosis is neurological.
Red Flags
- Sudden ptosis with diplopia or pupil change — neurological emergency, not aponeurotic; work up urgently.
- Fluctuating ptosis worse in the evening — think myasthenia, not aponeurosis.
- Ptosis after recent ocular surgery or trauma — consider dehiscence from the procedure; examine specifically.
Educational content only — not medical advice. Clinical decisions must be made by a qualified professional for the individual patient.
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