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Aetiology

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Authoring team

This condition is usually associated with rare systemic disorders:

  • chronic external ophthalmoplegia
  • Kearns-Sayre syndrome
  • Usher's syndrome
  • Lawrence-Moon-Biedl syndrome
  • Refsum's syndrome
  • Batten's syndrome
  • abetalipoproteinaemia

Only abetalipoproteinaemia is readily treatable.

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