He had an eye test last week.其中eye用单数吗?

He had an eye test last week.其中eye用单数吗? eye谓语用单数复数 An eye for an eye if you had half an eye eye keep an eye for an eye an eye for an eye 怎么翻译 take an eye to an eye eye for an eye这里的 谁知道an eye for eye 的意思? 请问Draw.an.eye, Is this an eye?