The child exhibited perceptual disturbance, making it difficult for him to recognize shapes.
这个孩子表现出知觉障碍，使他难以识别形状。
Educators need to be aware of perceptual disturbances to better assist students with learning difficulties.
教育工作者需要了解知觉障碍，以更好地帮助有学习困难的学生。