macula and papula

例句：

1. 1. Macula is the part ofthe retina that receives light andsends it to the brain.
   视网膜中央凹是接收光线并将其发送到大脑的部分。
2. 2. Macula plays a crucial role invision because it contains the cone cells responsiblefor color perception.
   视网膜中央凹在视觉中起着至关重要的作用，因为它包含了负责感知颜色的锥细胞。
3. 3. Macula is oftenreferred to as the "spot" or"dot" in the center of theeye.
   视网膜中央凹通常被称为眼睛中心的“斑点”或“点”。