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English version of the Computer Vision Symptom Scale (CVSS17): Translation and Rasch analysis-based cultural

Mariano González-Pérez1, Carlos Pérez-Garmendia2, Kathleen Hoang3

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The English version of the Computer Vision Syndrome Scale (CVSS17ENG) is a reliable tool for assessing digital eye strain in English speakers. It shows comparable performance to the original Spanish version, validating its use in clinical and research settings.

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Area of Science:

  • Ophthalmology
  • Psychometrics
  • Human-Computer Interaction

Background:

  • The original Computer Vision Syndrome Scale (CVSS17) was developed in Spanish.
  • Adaptation to English is necessary for broader clinical and research application.

Purpose of the Study:

  • To linguistically and culturally adapt the CVSS17 into English (CVSS17ENG).
  • To evaluate the psychometric properties of the English version.

Main Methods:

  • Translation and cultural adaptation of the CVSS17.
  • Administration of CVSS17ENG to 441 general population participants.
  • Rasch analysis (partial credit model) for measurement properties.
  • Convergent validity assessed with Ocular Comfort Index and Visual Discomfort Scale.
  • Test-retest reliability evaluated on a subset of 218 participants.
  • Differential Item Functioning (DIF) used to check for item bias.

Main Results:

  • CVSS17ENG demonstrated good fit to the Rasch model and good precision (PSI=2.73).
  • Convergent validity was supported by significant correlations with Ocular Comfort Index (ρ=0.66) and Visual Discomfort Scale (r=0.54).
  • Test-retest reliability showed acceptable limits of agreement.
  • No significant item bias was found based on sex or age.

Conclusions:

  • The English version of the CVSS17 (CVSS17ENG) is a psychometrically sound instrument.
  • It demonstrates comparable performance to the original Spanish version.
  • CVSS17ENG is suitable for reliable assessment of digital eye strain in English-speaking populations.