Figure 6.

Preferred orientation of collagen fibrils in the cornea and limbus of one control and one beg chicken at 9 months posthatch, sampled at 0.4 mm (control) and 0.5 mm (beg) intervals. There is more severe disturbance to the collagen pseudoannulus at 9 months posthatch than at 3 months. At 9 months, circumferential collagen in the corneal periphery is predominantly orthogonal (inside open triangles) or near-vertical (open arrows) in orientation. The larger peripheral plots were scaled down for montage display, as indicated in the color keys below each map. Broken lines mark the boundaries of the two structurally distinct regions of the cornea (the central orthogonal region and the peripheral pseudoannular zone). Red arrowheads highlight the superior globe position. Control data reproduced from Boote et al. (4).