English version

contact lens

From Longman Dictionary of Contemporary Englishcontact lensˈcontact ˌlens noun [countable]  MHa small round piece of plastic that you put on your eye to help you see clearly
Examples from the Corpus
contact lensBut Tucker was fine; he had just lost a contact lens.A contact lens holder - I recognized it, Mum wears them - still with the lenses in them.Amongst these are contact lens wetting solutions, comfort drops and artificial tears, which, perhaps surprisingly, have similar compositions.But in infant monkeys wearing an opaque contact lens, this changes.
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