A type of compound eye found in insects and crustaceans where each visual unit (ommatidium) is separated by pigment, producing sharp images through a process called apposition vision.
From Greek 'eu' (well) + 'konus' (cone), describing the conical structure of individual eye units. The term was coined by zoologists in the early 20th century studying insect vision mechanisms.
Eucone eyes are why dragonflies and bees can see ultraviolet patterns on flowers that we're completely blind to—they're basically nature's multispectral cameras, and insects evolved these incredible visual systems over 300 million years before humans invented photography!
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