lamina cribrosa

The lamina cribrosa is thought to help maintain the pressure gradient between the inside of the eye and the surrounding tissue.

Lamina cribrosa may refer to:

These include anterior chamber seeding, choroidal involvement, tumor beyond the lamina cribrosa, or scleral and extrascleral extension.

These devices surrounded the lamina cribrosa, hundreds of them in a man of Kax's profession, unscratched by the glass fragments that had destroyed his normal vision.

Cribriform plate of the ethmoid bone (horizontal lamina or lamina cribrosa ossis ethmoidalis)

SHG microscopy has been used for extensive studies of the Cornea and Lamina cribrosa sclerae, both of which consist primarily of collagen.

The inner third joins with some choroidal tissue to form a plate (lamina cribrosa) across the optic nerve with perforations through which the optic fibers (fasciculi) pass.

The nerve fibers forming the optic nerve exit the eye posteriorly through a hole in the sclera that is occupied by a mesh-like structure called the lamina cribrosa.

As the nerve fibers pass through the lamina cribrosa sclerae they lose their medullary sheaths and are continued onward through the choroid and retina as simple axis-cylinders.

Being structurally weaker than the much thicker and denser sclera, the lamina cribrosa is more sensitive to changes in the intraocular pressure and tends to react to increased pressure through posterior displacement.

This is thought to be one of the causes of nerve damage in glaucoma, as the displacement of the lamina cribrosa causes the pores to deform and pinch the traversing nerve fibers and blood vessels.