Felis ISSN 2398-2950

Eyelid: third eyelid flap

Synonym(s): Nictitating membrane flap

Contributor(s): Dennis E Brooks, Paul Evans, Lorna Newman, David L Williams

Introduction

  • The nictitating membrane can be used as a flap to protect and support the weakened cornea and to assist corneal healing:
    • Warming cornea promotes higher cellular metabolic rates.
    • Lymphoid follicles on bulbar nictitans provide inflammatory cells to cornea.
    • Decreases trauma to cornea from normal lid movement.
    • Decreases evaporation of tears.
    • Scarification of bulbar surface can provide serum/inflammatory cells, fibroblasts and blood.

Uses

Advantages

  • Simple to perform.
  • Gives good protection to cornea.
  • Topical liquid medication and ointments can still be administered.

Disadvantages

  • Cornea cannot be examined while flap is in place (bandage contact lens better from this perspective).

Requirements

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Preparation

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Procedure

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Aftercare

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Outcomes

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Further Reading

Publications

Refereed papers

Other sources of information

  • Gelatt K N & Gelatt J P (1994) Handbook of Small Animal Surgery. Vol. I - Extraocular procedures. Oxford Elsevier Science Pergamon Veterinary Handbook Series. ISBN 008 042 2691.
  • 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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