Assessment tool for visual perception deficits in cerebral visual impairment: development and normative data of typically developing children

Aim To develop an assessment tool that measures a wide range of visual perceptual deficits common in cerebral visual impairment (CVI) and to provide normative data from typically developing children between 3 and 6 years of age. Method Test development reflected cross‐talk between vision research and clinical relevance for CVI. The Children's Visual Impairment Test for 3‐ to 6‐year‐olds (CVIT 3–6) includes 14 subtests covering four domains of visual perception: Object Recognition, Degraded Object Recognition, Motion Perception, and Global–Local Processing. Normative data were collected from 301 typically developing children (mean age 4y 8mo [SD 9.7mo]; 148 females, 153 males). A questionnaire was administered to parents about pregnancy duration, birth, and developmental problems. Results Average total CVIT 3–6 performance was 60.1 (SD 5.5) out of 70. The cut‐off score for normal visual perception (53) was set at the 10th centile of scores in typically developing children. Multiple regression indicated CVIT 3–6 visual perception scores increase with age for children born at 36 weeks’ gestational age or later (β=−18.03, 95% confidence interval −31.31 to −4.75). Interpretation CVIT 3–6 is a tool to assess a wide range of visual perceptual deficits common in CVI. Age‐dependent normative data are available because we found performance increased with age. What the paper adds A test for visual perceptual deficits common in cerebral visual impairment. Visual perceptual functions improve with age in full‐term typically developing children. Resumen Herramienta de evaluación para las deficiencias de la percepción visual en la discapacidad visual cerebral: desarrollo y datos normativos de niños con desarrollo típico Objetivo Desarrollar una herramienta de evaluación que mida una amplia gama de déficits de percepción visual comunes en la discapacidad visual cerebral (CVI) y proporcionar datos normativos de niños con un desarrollo típico entre los 3 y los 6 años de edad. MÉtodo El desarrollo de la prueba reflejó la alineación de contenidos entre la investigación de la visión y la relevancia clínica para la CVI. La prueba de discapacidad visual para niños de 3 a 6 años (CVIT 3–6) incluye 14 subpruebas que cubren cuatro dominios de la percepción visual: reconocimiento de objetos, reconocimiento de objetos con fondos borrosos, percepción de movimiento y procesamiento global y local. Se recopilaron datos normativos de 301 niños con desarrollo típico (edad promedio 4 años y