La Yan Jing (辣眼睛, Là yǎnjīng), literally spicy eyes, is a common internet slang word in China. It generally refers to the symptoms of discomfort to the eyes.
La Yan Jing describes a person’s weird appearance and the feeling that we’d want to close eyes when we’d see it.
In Internet terms, it is used to describe things that are not good-looking or we’d better not see – for example, when someone’s behavior is disgusting, we don’t want to look at it directly.