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Related Experiment Video

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Collagen Cross-linking for Microbial Keratitis.

Prashant Garg1, Sujata Das2, Aravind Roy3

  • 1Tej Kohli Cornea Institute, KAR Campus, L. V. Prasad Eye Institute, Hyderabad, Telangana, India.

Middle East African Journal of Ophthalmology
|May 27, 2017
PubMed
Summary
This summary is machine-generated.

Collagen cross-linking shows antimicrobial and structural benefits for corneal ulcers. However, current evidence for its effectiveness in treating human corneal infections is weak, necessitating further high-quality clinical trials.

Keywords:
Acanthamoebabacteriacollagen cross-linkingfungimicrobial keratitisriboflavinstromal melt

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Area of Science:

  • Ophthalmology
  • Microbiology
  • Biomaterials Science

Background:

  • Collagen cross-linking (CXL) is increasingly used for keratoconus and corneal infections.
  • Photoactivated riboflavin and ultraviolet A light (CXL) have demonstrated antimicrobial properties and enhance corneal biomechanics.
  • CXL's dual action aims to combat pathogens and prevent stromal degradation in corneal ulcers.

Purpose of the Study:

  • To review and assess the existing evidence for the efficacy of collagen cross-linking in managing corneal ulcers.
  • To evaluate the level of evidence supporting CXL for various types of microbial keratitis.

Main Methods:

  • Systematic review of published literature on collagen cross-linking for corneal ulcers.
  • Analysis of in vitro, animal, and human clinical studies (case reports, series, trials).
  • Evaluation of CXL's antimicrobial spectrum and biomechanical effects.

Main Results:

  • In vitro and animal studies confirm CXL's antimicrobial activity against bacteria, fungi, and parasites, and its ability to strengthen corneal tissue.
  • Human studies show variable results, with beneficial effects reported for bacterial ulcers, particularly superficial ones.
  • Evidence for efficacy in fungal and parasitic keratitis is mixed, and treatment protocols and patient populations are inconsistent across studies.

Conclusions:

  • The current level of evidence supporting collagen cross-linking for corneal ulcers is considered weak.
  • While promising for bacterial keratitis, further robust, high-quality clinical trials are essential to determine its true therapeutic value.
  • Well-designed studies are needed to standardize protocols and evaluate CXL's effectiveness across different microbial causes and severities of corneal ulcers.