Fig 1.
Flow diagram showing the study details.
Table 1.
Summary of CVSS17ENG and Visual Discomfort Scale (VDS) results in the pretest sample, expressed as raw scores and logits.
Fig 2.
Scatter plot of correlation between CVSS17ENG and VDS.
Values are expressed in logits.
Table 2.
CVSS17ENG item fit statistics.
Fig 3.
Rasch item-person map, displaying the self-reported symptoms level of the patients in our study (left side) along with the corresponding item difficulty (right side).
Table 3.
Main characteristics of the samples used in the study.
Table 4.
Comparison among CVSS17ENG, the original CVSS17 and Rasch model expectations.
Fig 4.
Scatter plot of the association between CVSS17ENG and Ocular Comfort Index (OCI).
OCI and CVSS17ENG scores are expressed in logits.
Table 5.
Summary of convergent validity assessment results.
Fig 5.
Bland-Altman plot for CVSS17ENG.
where the dotted line represents the mean difference between scores obtained from completing the questionnaire on two occasions. The solid lines represent the lower and upper 95% limits of agreement. The scores are expressed in raw score units.