Location of scleral canal using x-ray data.

<p>A) Map of total collagen x-ray scatter across a mid-stromal section of the human peripapillary sclera and ONH. Smaller scatter values, indicative of lower collagen density, typify the central, porous lamina cribrosa. B) Vertical data transect through the map shown in A). The abrupt reduction in collagen scatter when passing from the peripapillary sclera into the lamina may be used to locate the scleral canal edge (<i>arrows</i>).