Medico Plasma on Instagram: "Structural Layers of the Eyeball The human eyeball, measuring roughly 24 mm in diameter, is engineered as a layered optical system where structure and function evolve from outside to inside. The fibrous coat forms the protective shell—its transparent cornea bends incoming light with remarkable precision, while the tough white sclera preserves shape and anchors extraocular muscles for coordinated movement. At the corneoscleral junction, the limbus quietly maintains co