1、Keratectasia is a condition in which the cornea thins and bulges, causing vision problems.
视角膜凹陷是一种视角膜变薄和突出的情况，导致视力问题。

2、Surgical intervention may be necessary to correct keratectasia and improve vision.
可能需要手术干预来纠正视角膜凹陷并改善视力。