purple macula

例句：

1. 1. The doctor examined the patient's eyes and found a purple macula.
   医生检查了患者的眼球，发现有一个紫色的视网膜。
2. 2. The patient had a rare genetic disorder that affected his purple macula.
   患者患有一种罕见的遗传病，影响了他的紫色视网膜。
3. 3. During surgery, the surgeon carefully removed the damaged part of the patient's purple macula.
   在手术中，外科医生小心翼翼地切除了患者紫色视网膜受损的部分。