sclera

例句：

1. 1. The doctor examined the patient's eye and found a small sclera opacity.
   医生检查了患者的眼并发现眼白有轻微的混浊。
2. 2.Sclera is a common cause of cataracts in older people.
   眼白是老年人白内障的常见原因。
3. 3.During surgery, the surgeon removed the sclera to improve vision.
   在手术中，外科医生切除了眼白以改善视力。