Like most #insects, the greenfly has a pair of compound #eyes. Each #eye is made up of a cluster of thousands of light-sensing units called ommatidia which work together to produce a #mosaic image. The width of the scanning #electron micrograph shown here is 0.28 millimeters.  #PhotoOfTheDay #science #biology #life #nature #eyeball #macro #micro 📷 Kevin Mackenzie, University of Aberdeen