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Interactive, computer-based, self-reported, visual function questionnaire: the PalmPilot-VFQ.

Y B Unver1, G A Yavuz, S H Sinclair

  • 1Beyoğlu Eye Training and Research Hospital, Istanbul, Turkey. yaprakbanu@yahoo.com

Eye (London, England)
|May 30, 2009
PubMed
Summary
This summary is machine-generated.

The Palm Pilot-Visual Function Questionnaire (PalmPilot-VFQ) is a reliable and valid tool for assessing vision disability. It performs well compared to standard questionnaires and is faster for patients to complete.

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Area of Science:

  • Ophthalmology
  • Medical Technology
  • Health Informatics

Background:

  • Patient-reported outcomes are crucial for evaluating visual function.
  • Traditional questionnaires can be time-consuming and resource-intensive.
  • Digital health tools offer potential for efficient data collection.

Purpose of the Study:

  • To assess the performance, reliability, and validity of a novel self-administered visual function questionnaire on a Palm Pilot device.
  • To compare the PalmPilot-Visual Function Questionnaire (PalmPilot-VFQ) against the interviewer-administered National Eye Institute Visual Function Questionnaire-25 (NEI-VFQ-25) and the self-administered NEI-VFQ-25.
  • To evaluate the utility of a digital tool for functional vision assessment.

Main Methods:

  • 135 retina clinic patients completed interviewer-NEI-VFQ-25, followed by PalmPilot-VFQ and self-NEI-VFQ-25 on separate days.
  • Rasch analysis was used for PalmPilot-VFQ item difficulty and interval scaling.
  • Reliability (Cronbach's alpha, ICC) and validity (correlation with general vision, NEI-VFQ-25, HCVA, VAS) were assessed.

Main Results:

  • After item refinement, PalmPilot-VFQ demonstrated good internal consistency (Cronbach's alpha=0.89) and test-retest reliability (ICC=0.79).
  • The questionnaire showed strong concurrent and convergent validity, correlating well with established measures.
  • PalmPilot-VFQ completion was feasible for 90% of patients and significantly faster than interviewer- or self-administered NEI-VFQ-25.

Conclusions:

  • The PalmPilot-VFQ is a reliable, valid, and interactive computer-based tool for self-administered functional vision assessment.
  • This digital questionnaire can be routinely used by clinicians to evaluate visual disability, particularly in macular disease populations.
  • The PalmPilot-VFQ offers an efficient alternative for assessing functional vision in clinical settings.