anterior pole of lens

例句：

1. 1. The anterior pole ofthe lens is responsible for focusing light ontothe retina.
   前极板负责将光线聚焦到视网膜上。
2. 2. In optometry, the anterior pole of the lens ismeasured to determine prescription.
   在眼科，测量前极板来确定处方。
3. 3. The anteriorpole of the lens is where the cornea meets the iris.
   前极板是角膜与虹膜的交界处。