Basic Knowledge

Function: The sclera and the cornea form the rigid outer covering of the eye. All six ocular muscles insert into the sclera.

Morphology: The sclera is fibrous, whitish opaque, and consists of nearly acellular connective tissue with a higher water content than the cornea. The sclera is thickest (1 mm) anteriorly at the limbus of the cornea where it joins the corneal stroma and at its posterior pole. It is thinnest (0.3 mm) at the equator and beneath the insertions of the rectus muscles. The site where the fibers of the optic nerve enter the sclera is known as the lamina cribrosa. In the angle of the anterior chamber, the sclera forms the trabecular network and the canal of Schlemm. The aqueous humor drains from there into the intrascleral and episcleral venous plexus through about 20 canaliculi.

Neurovascular supply: Vortex veins and the short anterior and posterior ciliary arteries penetrate the sclera. The ciliary nerves course through the sclera from posterior to anterior.

Was this article helpful?

0 0
Discarding Negative Habits

Discarding Negative Habits

I ought to change, but I've attempted and failed. Does this seem familiar? Frequently, altering habits does seem insurmountable. A lot of us merely don't have enough motivation to alter our habits all of our foul habits in a way that would really affect our life. We hold them tight as we view them as rewards. But your habits determine your life. Discarding Negative Habits Methods That Will Help You Deconstruct The Bad Habits Holding You Back.

Get My Free Ebook

Post a comment