Figure. 4

Schematic diagram showing the course of the expansion of the vitreous fluidic cavities and the development of connections between the cavities. Top row: at birth, Cloquet’s canal (CC) and a small premacular vitreous cavity are present on the retinal surface. These cavities are connected by narrow canals as seen in the axial sectional image. On the sagittal section image, the superior boundary of the premacular vitreous pocket (PMP) is lifted-up and the narrow canal extends anteriorly. Bottom row: with increasing age, the fluidic cavities expand and the PMP develop. The connection between PMP and CC is also seen in the axial sectional images. In the sagittal sectional image, trunk-like fluidic space can be seen to expand anteriorly from the superior edge of the PMP. C Cloquet’s canal, P premacular vitreous pocket, F Fovea, OD optic disc.