最常见的是开角型青光眼（open-angle glaucoma）。 患这种病的眼部排水渠道被部分堵塞。

The most common is primary open-angle glaucoma, in which the eye’s drainage canals are partly clogged.

他说： “网格中有一些间隙，在这些间隙里交叉着很小的自然排水渠道，而这些线条本身却没有完全被充填，有着许多小的条纹和不均匀的覆盖范围。

They have gaps in them where they cross little natural drainage channels and the lines themselves are not perfectly filled in, with lots of little streaks and uneven coverage.