Assertion: dragonfly's compound eye | /r/MadeOf | ommatidia
Facets:
Source sentences:
text: Each compound eye contains 28,000 lenses or ommatidia and a dragonfly uses about 80% of its brain to process all of the visual information it receives.﻿﻿
text: Each compound eye contains as many as 30,000 lenses, or ommatidia.