retinacs insert

例句：

1. 1.The doctor examined her retina and found no signs of damage.
   医生检查了她的视网膜，没有发现任何损伤的迹象。
2. 2.She lost her sight in one eye due to a rare genetic disorder.
   由于一种罕见的遗传性疾病，她一只眼睛失明了。
3. 3.Retinal degeneration is a common cause of blindness in the elderly.
   视网膜退化是老年人失明的常见原因。