Psychometric properties of the Portuguese version of the National Eye Institute Visual Function Questionnaire-25.
Ricardo Yuji AbeFelipe A MedeirosMilton Agrizzi DaviCecília GonçalvesMatheus BittencourtAlicia Buffoni RoqueJúlia BoccatoVital Paulino CostaJosé Paulo Cabral VasconcellosPublished in: PloS one (2019)
The Portuguese version of the NEI VFQ-25 is not a unidimensional instrument. We were able to find items that belong to a different trait, possible related to a socio-emotional component. Thus, in order to obtain psychometrically valid constructs, both the visual functioning and socio-emotional components should be analyzed separately.