Embargoed to 0001 Monday March 7 Undated handout image issued by Wellcome Images titled Inside the human eye by Peter Maloca, University of Basel, as the 20 winning images in the 2016 Wellcome Image Awards have been revealed. A 3D picture inside the back of a human eye. Tunnels like these carry blood to the eye to help it work properly. Pictures like this are used by doctors to help them spot early signs of disease in the eye. These tiny tunnels are about 100 micrometres (0.1 mm) tall. PRESS ASSOCIATION Photo. Issue date: Monday March 7, 2016. The winning pictures, selected by a panel of judges including BBC medical correspondent Fergus Walsh, will be exhibited in 16 venues including the Science Museum in London. Photo credit should read: Peter Maloca, University of Basel/PA Wire NOTE TO EDITORS: This handout photo may only be used in for editorial reporting purposes for the contemporaneous illustration of events, things or the people in the image or facts mentioned in the caption. Reuse of the picture may require further permission from the copyright holder. These images are provided for use with stories relating to Wellcome Image Awards 2016 and participating exhibitions only. Please ensure that you use the appropriate credit line. Images must not be archived or re-used for any other purpose without the prior written permission of Wellcome Images.