This low-magnification micrograph shows the full thickness of (Cj). The white opaque appearance of the sclera is due to the irregular dense the sclera just lateral to the corneoscleral junction or limbus.
arrangement of the collagen fibers that make up the stroma (S ). The canal To the left of the arrow is sclera; to the right is a small amount of Schlemm (CS ) is seen at the left close to the inner surface of the sclera.
of corneal tissue. The conjunctival epithelium (CjEp) is irregular
Corneoscleral junction and canal of Schlemm, eye, the sclera. Note that Bowman’s membrane (B), lying under the corneal human, H&E 360. epithelium, is just perceptible but  disappears beneath the conjunctival epithelium. Figure below shows at higher magnification the canal of Schlemm
Upper figure is a higher-magnification micrograph showing (CS ) than does top left figure. That the space shown here is not an artithe transition from the corneal epithelium (CEp) to the irfact is evidenced by the endothelial lining cells (En) that face the lumen.
Cornea, eye, human, H&E 175. white spaces seen here and in figure on left are artifacts). Nuclei (N ) of the keratocytes of the stroma lie between lamellae. The corneal epithelium rests
This low-magnification micrograph shows the full thickness of on a thickened anterior basement membrane called Bowman’s membranethe cornea (C) and can be compared with the sclera shown in (B). The posterior surface of the cornea is lined by a simple squamous figure on left. The corneal epithelium (CEp) presents a uniepithelium called the corneal endothelium (CEn); its thick posterior base-form thickness and the underlying stroma (S ) has a more ment membrane is called Descemet’s membrane (D).
homogeneous appearance than the stroma of the sclera (the
Corneal epithelium and endothelium, eye, human, underlying stroma (S ). Note that the stromal tissue has a  homogeneous ap-H&E 360. pearance, a reflection of the dense packing of its collagen fibrils. The flattened nuclei belong to the keratocytes. Lower figure shows the posterior
Upper is a higher magnification showing the corneal epithe surface of the cornea. Note the thick homogeneous Descemet’s memlium (CEp) with its squamous surface cells, the very thick brane (D) and the underlying corneal endothelium (CEn).
homogeneous-appearing Bowman’s membrane (B), and the
Lens, eye, human, H&E 360. are present on the anterior surface of the lens, but at the lateral margin they become extremely elongated and form layers that extend toward the center
This micrograph shows a portion of the lens near its equator.
of the lens. These elongated columns of epithelial cytoplasm are referred to The lens consists entirely of epithelial cells surrounded by a as lens fbers (LF ). New cells are produced at the margin of the lens and homogeneous-appearing lens capsule (LC ) to which the displace the older cells inwardly. Eventually, the older cells lose their nuclei, zonula fibers attach. The lens capsule is a very thick basal lamas evidenced by the deeper portion of the cornea in this micrograph.
ina of the epithelial cells. Simple cuboidal lens epithelial cells
KEY AC, anterior chamber B, Bowman’s membrane BV, blood vessels C, cornea CEn, corneal endothelium CEp, corneal epithelium Cj, conjunctiva CjEp, conjunctival epithelium CS, canal of Schlemm D, Descemet’s membrane En, endothelial lining cells LC, lens capsule LF, lens fibers N, nuclei S, stroma