Its thickness varies significantly across the globe; it is thickest at the optic nerve insertion point, measuring about 1 millimeter, and thins to roughly 0. Furthermore, the sclera contributes to the eye's immune defense system.
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The tissue is densely packed with type I collagen fibrils arranged in a highly organized lattice, interspersed with proteoglycans and elastic fibers. The sclera , often recognized as the white of the eye, is a fascinating and complex structure that forms the protective outer layer of the eyeball.
3 millimeters just behind the rectus muscle insertions. Its primary role is as a rigid shield, protecting the retina, choroid, and delicate intraocular structures from trauma and external pressure.
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Unlike the transparent cornea, the sclera is opaque and primarily composed of collagen and elastin fibers, giving it its characteristic white appearance. A slit-lamp examination allows for a detailed view of the surface and superficial vessels, while imaging technologies like anterior segment optical coherence tomography (AS-OCT) provide cross-sectional views of the tissue architecture.
More About Sclera
Looking at Sclera from another angle can help expand the discussion and give readers a second clear paragraph under the same section.
More perspective on Sclera can make the topic easier to follow by connecting earlier points with a few simple takeaways.
