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Relationship between the Children’s Visual Function Questionnaire and psychophysical measures of visual acuity and chromaticity discrimination in older visually impaired children

The Children’s Visual Function Questionnaire (CVFQ) is an instrument to measure the impact of visual impairment in children and their families. It can be used as a research tool to verify the effectiveness of treatment, therapy, and different methods for visual stimulation and rehabilitation. The aim of this study is to describe the relationship between General Health, General Vision Health, Personality, Family Impact, and Treatment – subscales of the CVFQ and psychophysical measures of visual acuity (VA) and chromaticity discrimination (CV). This prospective, cross-sectional study was conducted at the Sensory Psychophysiology Laboratory – University of São Paulo in partnership with the Ambulatory of Visual Stimulation in the Sector of Low Vision and Visual Rehabilitation – Federal University of São Paulo. The children who participated in this study were divided into two groups: study group (SG), composed of 11 children with a diagnosis of visual impairment and mean age of 55.36 months ( SD = 16.88), and control group (CG), composed of 8 children with normal vision and mean age of 64.87 months ( SD = 13.22). Both groups underwent the application of CVFQ, were tested for VA using the Teller Acuity Cards (TAC) test, and CV using the Cambridge Colour Test program for children (CCT Kids). The result of applying the CVFQ to groups of children over 3 years, comparing SG and CG, differences were observed in the following subscales: General Vision Health ( F = 10.00, p < .001); Competence ( F = 7.03, p = .030); Personality ( F = 6.48, p = .010); Total Quality of Life ( F = 11.39, p = .010). These differences show a worse score for the SG. In the VA test using TAC, the data collected in groups of children over 3 years, comparing SG and CG, differences were observed in VA RE ( F = 19.25, p < .001); VA LE ( F = 25.99, p < .001); VA BE ( F = 15.45, p < .001). These differences show worse scores for the SG. In the CV using the CCT Kids, the data collected in groups of children over 3 years, comparing SG and CG, no statistically significant differences for protan, tritan, and deutan groups were observed. For the SG, while for children over 3 years, correlations were found for General Vision Health, Competence, Family Impact, and General Quality of Life. We conclude that there are statistically significant differences when comparing the SG with the CG for the visual function of visual acuity and chromaticity discrimination, and we also demonstrated the sensitivity in the use of CVFQ in reflect VA and CV impairments.