巩膜

例句：

1. 1. Thedoctor examined the patient's eyeballand found a swollen,painful mass in the sclera.
   医生检查了病人的眼球，发现眼白中有一个肿胀、疼痛的肿块。
2. 2. Duringthe operation, the surgeonhad to remove the sclera for better access to the retina.
   在手术过程中，外科医生为了更好的进入视网膜，不得不切除眼白。
3. 3.The patient was advised to avoid rubbingthe eyeball with dirty hands as itcould cause damage to the sclera.
   患者被建议不要用手脏兮兮的手去揉眼睛，因为这可能会损坏眼白。