A Guide to Clinical Contact Lens Management

Signs, Symptoms, Diagnosis and Management

Academy for Eyecare Excellence™
IN COOPERATION WITH
Centre for Contact Lens Research
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Dellen
Dellen

Corneal Dellen

Desiccation, focal corneal dehydration

Symptoms

  • None to dryness and discomfort

Signs

  • Local saucer-like depression in the peripheral cornea
  • May be associated scarring and vascularization
  • Epithelium intact

Etiology

  • Localized dryness and desiccation
  • Loss of stromal hydration causes compaction of lamellae
  • Occasionally occurs with 3 and 9 o'clock staining in GP lens wear

Prevalence

  • Rare

Differential Diagnosis

Management

  • Eliminate causes of 3 and 9 o'clock staining
  • Depression may resolve within days, scarring may not resolve
  • Persistent dellen may require reducing lens wearing time or refitting with soft lenses
  • Blinking exercises and rewetting drops may also help
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