Felis ISSN 2398-2950

Eye: lens opacity

Synonym(s): Cataract

Contributor(s): Dennis E Brooks

Introduction

  • Cause: secondary to uveitis, trauma, diabetes (very rarely gives cataract in cat), lens luxation or glaucoma.
  • Signs: opacity of lens.
  • Diagnosis: history, clinical signs, ophthalmoscopic examination, ultrasonography.
  • Treatment: surgical removal if total.
  • Prognosis: good.

Pathogenesis

Etiology

Pathophysiology

  • Disruption of lens fibers   →   opacity.
  • Sorbitol accumulation in diabetics   →   disruption of lens fiber   →   lens opacity.

Timecourse

  • Varies according to cause:
    • Usually chronic onset.
    • Occasionally very acute and develops over days.

Diagnosis

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Treatment

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Outcomes

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Further Reading

Publications

Refereed papers

Other sources of information

  • Barnett K C & Crispin S M (1998) Feline Ophthalmology - an atlas and text. W B Saunders & Co Ltd.
  • Petersen-Jones S & Crispin S (2002) BSAVA Manual of Small Animal Ophthalmology. 2nd edn. British Small Animal Veterinary Association. ISBN 0 905214 54 4


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