a surgical procedure in which part or all of a damaged or diseased cornea is replaced by healthy corneal tissue from a donor 損傷した、または病変した角膜を、ドナーからの健康な角膜組織に取り替える外科手術。
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【上位】 an operation moving an organ from one organism (the donor) to another (the recipient); "he had a kidney transplant"; "the long-term results of cardiac transplantation are now excellent"; "a child had a multiple organ transplant two months ago" 1つの有機体（提供者）からもう一人（受取人）まで器官を移動させる手術。
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【下位】 using a piece of donated corneal tissue to repair the eye of someone who has had a cataract removed; "epikeratophakia gave her a living contact lens" 提供された角膜組織を使って、白内障を除去した人の目を修復すること。
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