眼光学结构-晶状体(Lens)

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The lens is located in the eye. By changing its shape, the lens changes the focal distance of the eye. In other words, it focuses the light rays that pass through it (and onto the retina) in order to create clear images of objects that are positioned at various distances. It also works together with the cornea to refract, or bend, light. 晶状体位于眼中，通过改变其形状，晶状体可以改变眼睛的焦距。 换言之，它将穿过它的光线聚焦在视网膜上，以获得不同距离物体的清晰图像，它与角膜一起折射或弯曲光线。 Lens shape and structure The lens is a biconvex, avascular, noninnervated, encapsulated body composed entirely of epithelial cells and fibers. The lens is of ellipsoid. An ellipsoid is similar to a sphere but stretched out, like an olive, and biconvex means it’s rounded outward on both sides. The lens is about 10 mm across and 4 mm from front to back in adults, although its shape and size varies as it changes its fo ………………………………