Compound eye of wasp, coloured scanning electron micrograph (SEM). This is the eye of a digger wasp (family: Sphecidae). The eye consists of hundreds of individual structures called ommatidia. Each ommatidium is capped by a cuticular biconvex lens, and it is the cumulative effect of these that produces the vision of a compound eye. Magnification: x60 when printed at 10 centimetres across.