Zebrafish eye development

This differential interference contrast image shows a section through the eye of a three-day old zebrafish embryo. At this stage of development, the nerve cells in the retina have begun to separate into different layers. The outer layer of cells are stained black with a marker for photoreceptor cells, the neurons that respond to light. (credit: R. MacDonald & S. Wilson) Biomedical Image Awards 1998.