sheath of eyeball

例句：

1. 1. Thesurgeon carefully removed the sheath of eyeball to repair the damaged tissue.
   外科医生小心翼翼地切除了眼球的外皮以修复受损的组织。
2. 2. The patient'seyes were examined under a microscope to determinethe cause of the sheath of eyeball.
   患者的眼睛在显微镜下检查，以确定眼球外皮的原因。
3. 3. Thedoctor advised the patient to avoid touching thesheath of eyeball as it couldlead to infection.
   医生建议患者避免触摸眼球外皮，因为这可能导致感染。