Validation of the Functional Vision Evaluation for Children (FVEC) Battery

Background: we validated the recently developed Functional Vision Evaluation for Children (FVEC) Battery, which quantitatively measures major eye and visual function for rehabilitation. Methods The protocol for this test comprises 12 items involving unique abilities of the functional vision evaluated for 3 subsequent periods. Validation procedure includes analysis of difficulty of the examiner performance, the reliability and symmetry evaluation of the battery items and the prediction of the children in low vision category on a 0-100 ranking scale of visual behaviors. Factor analysis evaluates the contribution of the items to functions of Ventral and Dorsal visual streams. Results consistency was similar between the 3 examiners and the reliability intra-subjects was also significantly high for examiner 1 (α = 0.86), examiner 2 (α = 0.85) and examiner 3 (α = 0.87). A Factor Analysis confirms that we arranged our data in two major factors expressing Ventral and Dorsal-related visual functions. Conclusions we validate the FVEC battery with high robustness, internal consistency and an outcome regarding the functional performances for the visual Ventral and Dorsal-related functions.