Image of the Week: Bluebottle Fly Eye A closeup view of the grating-like structure of a bluebottle fly’s eye. The intricate structure enhances the eye’s optical performance, aiding in light capture and potentially improving sensitivity to polarized light—an ability vital for navigation and prey detection. [2025 #OPNPhotoContest ] —Vittorio Cecconi, Emergent Photonics Research Centre, Loughborough, UK