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Related Experiment Videos

Patient-Reported Visual Disability in Fuchs' Endothelial Corneal Dystrophy Measured by the Visual Function and

Katrin Wacker1, Keith H Baratz2, William M Bourne2

  • 1Department of Ophthalmology, Mayo Clinic, Rochester, Minnesota; Eye Center Faculty of Medicine, University of Freiburg, Freiburg, Germany.

Ophthalmology
|August 15, 2018
PubMed
Summary
This summary is machine-generated.

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The Visual Function and Corneal Health Status (V-FUCHS) instrument is a reliable tool for measuring visual disability in Fuchs

Area of Science:

  • Ophthalmology
  • Corneal Science
  • Patient-Reported Outcomes

Background:

  • Fuchs' endothelial corneal dystrophy (FECD) is a progressive condition affecting the cornea.
  • Assessing patient-reported visual disability is crucial for guiding treatment decisions and evaluating outcomes.
  • Existing measures may not fully capture the nuances of visual dysfunction in FECD.

Purpose of the Study:

  • To validate a novel patient-reported visual disability questionnaire, the Visual Function and Corneal Health Status (V-FUCHS) instrument.
  • To assess the reliability and validity of the V-FUCHS instrument in patients with FECD.
  • To evaluate the instrument's performance before and after endothelial keratoplasty (EK).

Main Methods:

  • Development of the V-FUCHS instrument based on patient interviews, expert consultations, and pretesting.

Related Experiment Videos

  • Application of psychometric methods, including classic test theory and Rasch-based partial credit models.
  • Comparison of V-FUCHS with the Catquest-9SF questionnaire for validity assessment.

    • Main Results:

    • The V-FUCHS instrument demonstrated substantial retest reliability (intraclass correlation coefficient ≥0.8).
    • The visual acuity factor of V-FUCHS correlated significantly with Catquest-9SF scores (r=0.65, P<0.001).
    • The glare/diurnal variation factor of V-FUCHS increased with FECD severity and was higher in FECD patients compared to healthy controls.

    Conclusions:

    • The V-FUCHS instrument is a valid and reliable tool for assessing visual disability in FECD.
    • The instrument provides a standardized, comprehensive, and rapid patient-reported outcome measure.
    • V-FUCHS may prove valuable in both clinical practice and research for FECD management.