tela choroidea of third ventricle

例句：

1. 1. The doctor examined the patient's eyes and found a tear in the retina.
   医生检查了病人的眼睛，发现视网膜上有一道裂痕。
2. 2. The patient was diagnosed with retinal degeneration.
   病人被诊断出患有视网膜退化症。
3. 3. The scientist conducted experiments on the retina to study vision.
   科学家对视网膜进行了实验，以研究视觉。