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Visual Impairment Screening Assessment (VISA) tool: pilot validation.

Fiona J Rowe1, Lauren R Hepworth1, Kerry L Hanna1

  • 1Department of Health Services Research, University of Liverpool, Liverpool, UK.

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|March 8, 2018
PubMed
Summary
This summary is machine-generated.

A new Vision Impairment Screening Assessment (VISA) tool shows promise for stroke survivors. This tool can improve the identification of visual impairment, leading to better patient outcomes and more accurate referrals.

Keywords:
detectionorthopticsscreeningstrokevisual impairment

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Area of Science:

  • Ophthalmology
  • Neurology
  • Public Health

Background:

  • Visual impairment is common in stroke survivors, often going undetected.
  • Early identification of vision problems is crucial for rehabilitation and recovery.
  • Existing screening methods may lack accuracy or accessibility for non-specialist clinicians.

Purpose of the Study:

  • To evaluate the effectiveness of the Vision Impairment Screening Assessment (VISA) tool.
  • To determine the accuracy of the VISA tool in identifying visual deficits in stroke survivors.
  • To assess the potential of the VISA tool for use by stroke teams without specialized vision training.

Main Methods:

  • A prospective case cohort comparative study was conducted.
  • 116 stroke survivors were screened using the VISA tool by both naïve and non-naïve screeners.
  • The VISA tool's performance was compared against a comprehensive specialist vision assessment.

Main Results:

  • The VISA tool demonstrated high sensitivity (90.24%) and specificity (85.29%).
  • Positive and negative predictive values were 93.67% and 78.36%, respectively.
  • Significant overall agreement (k=0.736) was observed, with lower agreement for eye movement and visual inattention screening.

Conclusions:

  • The VISA tool shows promise for improving the detection of visual impairment in stroke survivors.
  • It can aid non-specialist clinicians in identifying vision problems, potentially reducing false positives/negatives.
  • Pilot validation suggests the VISA tool is acceptable and guides further refinement for clinical use.