Figure 3.

Light microscopy of the human cornea and retina. (a and b) The locations of Bowman's (a¹) and Bruch's (a²) membranes seen in a higher power in (c and d), respectively. Transmission electron micrographs of Bowman's (e) and Bruch's (f) showing the basement membrane of the corneal epithelium (b¹) overlying a fine matrix of collagen fibrils in (e), while the basement membranes of retinal pigment epithelium (b²) and the endothelial cells of the choriocapillaris (b³) are seen in (f). The inner and outer layers of Bruch's membrane are labelled 1 and 2, respectively, and are separated by the elastin layer El in (f).