Equis ISSN 2398-2977

Eye: drug administration - contact lens

Contributor(s): Dennis E Brooks, Paul Gerding, Graham Munroe

Introduction

  • Contact lenses in the horse have been used as a corneal bandage to relieve corneal irritation and promote healing, but also show potential for some drugs as a reservoir system.

Uses

  • Can be used for treating a variety of corneal diseases:
    • Protects cornea from dust/debris.
    • Promotes corneal dehydration and shrinking.
    • Gives physical support to the cornea.
    • Acts as a guide for epithelial growth.
    • Improves conditions for corneal repair.

Advantages

  • Excellent support to cornea and encourages healing.

Disadvantages

  • Some skill required in choosing and fitting lens.
  • Easily lost or displaced if incorrectly fitted.
  • Rapid depletion of drug levels and therefore little benefit in the long-term.
  • Expensive.

Requirements

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Preparation

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Procedure

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Aftercare

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Further Reading

Publications

Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Hamor R E et al (1992) Ocular cosmetic and prosthetic devices. Vet Clin N A Equine Pract (3), 637-654 (Review) PubMed.
  • Miller T R (1992) Principles of therapeutics. Vet Clin N A Equine Pract (3), 479-497 (Review) PubMed.
  • Lavach J D et al (1984) Current concepts in equine ocular therapeutics. Vet Clin N A Large Anim Pract (3), 435-449 (Review) PubMed.
  • Tammeus J et al (1983) Therapeutic extended wear contact lens for corneal injury in a horse. JAVMA 182 (3), 286 PubMed.


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