Etymology

asthenopia

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Today it means: An eye condition that manifests itself through nonspecific symptoms such as fatigue, red eyes, eyestrain, pain in or around the eyes, blurred vision, headache and occasional double vision. Full definition →

English astheno- ← Ancient Greek ἀσθενής (asthenḗs) ← Proto-Hellenic *ə-
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The story

  1. Proto-Indo-European*né
  2. Proto-Indo-European*n̥-
  3. Proto-Hellenic*ə-
  4. Ancient Greekἀ- (a-)
  5. Ancient Greekσθένος (sthénos)
  6. Ancient Greekἀσθενής (asthenḗs)
  7. Englishastheno-
  8. English todayasthenopia

From astheno- (“loss of strength”) + -opia (“relating to the eyes”).

Etymology from Wiktionary, CC BY-SA 4.0.