Related Experiment Video
Updated: Nov 9, 2025
05:36
Subjective Refraction Test Using a Smartphone for Vision Screening
Published on: October 18, 2024
1.3K
[A new valid and reliable questionnaire of asthenopia: development and evaluation]
Summary
A new 19-item questionnaire effectively identifies causes of asthenopia (eye strain). This validated tool offers reliable assessment for eye care professionals and researchers, aiding in clinical trials and outcome studies.
Area of Science:
- Ophthalmology
- Psychometrics
- Clinical Research
Background:
- Asthenopia, or eye strain, presents diverse etiological factors.
- A validated and reliable tool is needed for accurate assessment and research.
Purpose of the Study:
- To develop and validate a questionnaire for identifying the causes of asthenopia.
- To create a reliable instrument for clinicians and researchers.
Main Methods:
- Initial item generation through literature review and expert consensus (Delphi method).
- Patient interviews and expert validation involving 275 asthenopia patients and 49 controls.
- Item reduction via exploratory factor analysis, with validity and reliability assessed using Cronbach's alpha and split-half reliability.
Main Results:
- A 19-item questionnaire was developed, classifying symptoms into three domains.
- The questionnaire demonstrated strong internal consistency (Cronbach's α 0.90) and split-half reliability (0.80).
- Factor analysis confirmed three components explaining 54.3% of the variance.
Conclusions:
- The 19-item asthenopia questionnaire possesses acceptable psychometric properties.
- It serves as a valid and reliable tool for evaluating asthenopia and its causes.
- The questionnaire is suitable for clinical practice, clinical trials, and outcome research.
