Jisho

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Noun, Suru verb, Intransitive verb
1. congestion (with blood); hyperemia; hyperaemiaMedicine
Wikipedia definition
2. Red eye (medicine)In medicine, red eye is a non-specific term to describe an eye that appears red due to illness, injury, or some other condition. Conjunctivitis and subconjunctival hemorrhage are two forms of a red eye. Since it is a common affliction, primary care doctors often deal with patients with red eyes in their practices.
Read “Red eye (medicine)” on English Wikipedia
Read “充血” on Japanese Wikipedia
Read “Red eye (medicine)” on DBpedia

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