Fig. 22. Portion of anterior segment of the eye at 75 mm (approximately 3 months). Blood vessels (large arrowheads) are adjacent to the indented portions of the pigment epithelium. The nonpigmented epithelium of the inner wall also starts to buckle (hollow arrow). Fiber strands (faisceau isthmique of Druault) or “marginal bundle” connect the vitreous with the mesoderm around the rim of the optic cup (small arrowheads). AC, anterior chamber; cap, capsulopupillary vessel of the hyaloid system; C, cornea; pm, pupillary membrane.