# Color Brightness Recognition of Extremely Severe Amblyopia Children in an Indoor Environment
## 4 Discussion  
The impact of indoor lighting and distance on color recognition among severely visually impaired children constitutes a relatively underexplored area within the realm of visual perception in special education settings. The findings highlight that distance emerges as the primary factor influencing color recognition. Although previous studies have separately investigated color design in the context of both special education schools and the visually impaired, there is a dearth of studies that integrate these two domains. Prior research on color design in special education schools has been deficient in empirical validation of the range of color applications [24,40]. Given the pivotal role of color in the indoor environmental context of schools, which significantly impacts the development of visually impaired children [12,21,23,24], it is imperative to further explore the relationship between color and the indoor environment. We posit that the higher scores for the low-brightness color under lighting conditions are less related to the gray-white background of the color palette and more associated with the illumination, color temperature, and color rendering index of the lighting. Research conducted by [PERSON] indicated that neither background color contrast nor differences in chromaticity were effective measures for improving the visual function of visually impaired  
Figure 13: Purple—Comparative analysis of weighted score differences between different groups. children [26]. However, [PERSON]'s findings suggested that attention was typically allocated to the foreground elements. They believed that unless there is a deliberate focus on the background, the contrast in color may not be noticed [50]. Several studies have shown that indoor lighting significantly influences color perception, with color temperature and color rendering index impacting human visual comfort [41; 44; 47]. Excessively high values of color temperature and color rendering index can cause the low-brightness color to appear brighter, thereby enhancing their visibility. In experiment settings, natural light, compared to artificial light, tends to have a higher color temperature and a stronger color rendering index, which may be one of the reasons for the higher scores of low-brightness colors. However, [PERSON] proposed that the cool color tone and the high-brightness color are more effective in aiding spatial orientation in the low-illumination environment [48], which is in direct contrast to our findings. In fact, cool color tones tend to darken the perceived brightness of colors, indicating a similarity between cool color tones and low-brightness colors. Given that our experimental scenarios were computer-generated with complex lighting conditions and involved a diverse set of participants, we believe that the discrepancy in findings may be attributed to the methodology employed in the respective studies. Regarding the specific case of purple, there is a scarcity of literature discussing the phenomenon of the color purple. Therefore, we hypothesize that the outcome of purple hues may be intrinsically linked to the color itself. Purple, being a composite color formed by the combination of red and blue, falls outside the traditional primary colors of light (red, green, blue) and pigment (red, yellow, blue). Furthermore, purple is not commonly observed in large quantities in everyday life. The irregular patterns observed in the scoring for purple warrant additional research to elucidate these findings. The experimental results concerning distance are consistent with previous studies, confirming that distance is a significant factor affecting color recognition [49]. Statistically significant variations in the weighted score suggested that as distance increases, the recognition rate for high-brightness colors decreases, while low-brightness colors consistently receive higher scores. It is noteworthy that distance did not produce a significant effect on green recognition [49].