Fig. 10. Transmission electron micrograph demonstrates that granular horseradish peroxidase (HRP) reaction product leaks through fenestrations (arrowheads) into the surrounding ciliary body stroma. (From Morrison JC, Van Buskirk EM, Freddo T. Anatomy, microcirculation and ultrastructure of the ciliary body. In: Ritch R, Shields MB, Krupin T (eds). The Glaucomas. St Louis: CV Mosby, 1989.)