Glaucoma is the second leading cause of blindness in the US and is usually associated with elevated intraocular pressure (IOP). Glaucomatous damage is believed to occur at the optic nerve head (ONH) where the retinal ganglion cell axons pass through an opening in the back of the eye wall on their path to the brain. This opening is spanned by the lamina cribrosa, a fenestrated connective tissue structure that provides structural and nutritional support for the axons as they pass through the eye wall.

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