Close similarities were observed between 360-degree virtual castings (A) and previous studies using colored silicone casting agents in monkey eyes (B) and neoprene casting agents in human eyes (C). Note the dense array of vasculature in virtual castings compared to silicone and neoprene corrosion castings. Schlemm's canal is seen as a discontinuous ring. OS = oculus sinister (left eye). Bar = 1 mm. Image (B) adapted with permission from Jocson VL, Sears ML. Channels of aqueous outflow and related blood vessels. II. Cercopithecus ethiops (Ethiopian green or green vervet). Arch. Ophthalmol. 1969;81:244–253; Image (C) adapted by permission from BMJ Publishing Group Ltd. Anatomical Study of Schlemm's Canal and Aqueous Veins by means of Neoprene Casts: Part II. Aqueous Veins (continued), Norman Ashton, British Journal of Ophthalmology, Vol. 36, pages 265–267, 1952.