In this contribution a retrospective study is presented with respect to the Reynell-Zinkin Scales [1] for visually handicapped children. The children of the Bartiméus Centre, assessed with this instrument, seemed to be overestimated by the reference-values of the scales. The main aim of this study was to find out if this could be proved. In order to examine this aim, the reference-values were evaluated. Futherniore, the internal reliabiltity of the scales was determined. It was concluded that the Reynell-Zinkin Scales need new norm-references for the sample involved in this study. These norms are now established and some preliminary results are discussed in this contribution.