39.9 MB (5.4 MB compressed)
4252 x 3279 pixels
36.1 x 27.7 cm ⏐ 14.2 x 10.9 in (300dpi)
HERVE CONGE, ISM / SCIENCE PHOTO LIBRARY HERVE CONGE, ISM / SCIENCE PHOTO LIBRARY
Cornea layers. Light micrograph of a section showing the layers of the human cornea. The cornea is the thick, transparent area covering the iris and pupil of the eye. The rest of the eye surface consists of the sclera (white of the eye). The cornea lacks blood vessels and consists of five layers. The outer surface (top) is lined by stratified squamous epithelium about five cells thick (pink, purple cell nuclei). The epithelial layer is supported by a specialised basement membrane that is called Bowman's membrane (beige/pink, across centre). Most of the cornea is the substantia propria connective tissue. This sample, from human tissue, was prepared with haematoxylin and eosin stain (HE stain). Magnification: x285 when printed at 10 centimetres across.
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