The Efron Grading Scales* provide a convenient clinical reference for eye care professionals.

On a scale of 0 to 4, it describes the severity of the following anterior ocular complications that can occur from contact lens wear.

  • Meibomian gland dysfunction
  • Superior limbic keratoconjunctivitis
  • Corneal infiltrates
  • Corneal ulcer
  • Endothelial polymegethism
  • Endothelial blebs
  • Corneal distortion
  • Conjunctival redness
  • Limbal redness
  • Corneal neovascularisation
  • Epithelial microcysts
  • Corneal oedema
  • Corneal staining
  • Conjunctival staining
  • Papillary conjunctivitis

Each condition includes five illustrations. Simply select a number on the scale for the corresponding illustration and visual signs of severity. Select the Info button for symptoms, pathology, treatment options and more.

* The Efron Grading Scales are designed to help eye care practitioners. It is not a substitute for a professional consultation with a qualified eye care practitioner.