Fig. 3.

Monkey 2 (adult monocular suture). Single CO section showing a faint pattern of dark columns alternating with pale columns in layer IVc, induced by suture of the right eye for 9 months. The dark columns were thinner than the pale columns (seetable). Note that the thin dark columns in layer IVcβ were continuous with the nearly confluent rows of dark patches in layer V (arrows). The light rows of patches were too faint to be seen clearly in layer V. The graph shows a linear plot, sampling at 10.58 μm/pixel, of optical density fromX to O. It confirms that the dark columns (arrows) are thinner than the pale columns. The columns seen after suture are much lower in contrast than those induced by enucleation, accounting for the expanded scale of they-axis compared with the graph in Figure 2.