›to have a problem with youreyes so that you see two of everything, usually because you are drunk or ill
（通常指因醉酒或疾病導致視力）出現重影I startedseeing double, then I fainted.
我的眼前開始出現重影，然後就暈了過去。Eyesight, glasses and lensesUsing the eyesThe eye and surrounding areaOptics, microscopy and lasers
by Colin McIntosh One of the many ways in which English differs from other languages is its use of uncountable nouns to talk about collections of objects: as well as never being used in the plural, they’re never used with a or an. Examples are furniture (plural in German and many other languages), cutlery (plural in Italian), and