Chemists, Engineers Craft Adjustable Arrays Of Microscopic Lenses

They number in the thousands, light striking the phalanx of lenses arrayed on a face in geometric pattern, the beams refracting through transparent mounds no wider than a hair.

A fly’s eye boasts roughly 4,000 microscopic lenses, a honeybee’s up to twice that many. These lenses, though, belong not to a compound eye but to...