Outside this central area, the cells rapidly become more sparse.These outer cells, responsible for peripheral vision, are great at detecting motion, but not so good at forming a clear image.

• 在中心区域以外，细胞开始急剧减少，外围的细胞对不重要的视觉负责，主要用于监测移动事物，但并不善于形成清晰影象。