Colour Brightness Recognition of Extremely Severe Amblyopia Children in Indoor Environment

Abstract This study examined the impact of indoor lighting conditions and distances on color recognition in visually impaired children. A total of ten participants from a special education school were selected to identify the brightness of five colors under varying lighting(natural and artificial) and distance conditions(3 m and 5 m). Each color was presented at six different brightness levels, which were classified into three groups: low brightness, standard brightness, and high brightness. The participants were instructed to identify the top three brightness levels they considered most attractive, with each rating assigned a weighted score. The findings indicated that: (1) Visually impaired children are able to recognize color brightness in both natural and artificial lighting situations. In indoor settings, the low-brightness group demonstrated superior recognition abilities compared to the high-brightness group. The purple did not exhibit a clear pattern, as colors from the high-brightness, low-brightness, and standard-colour groups were all preferred. (2) A significant difference was observed in the brightness recognition of visually impaired children at distances of 3 m and 5 m. Recognition of low-brightness colors improved with distance, in contrast to high-brightness scores, which declined. Nevertheless, no significant variation was observed in the perception of green with distance changes.