Human eye - Wikipedia
The cornea is transparent and more curved and is linked to the larger posterior segment, composed of the vitreous, retina, choroid and the outer white shell called the sclera. The cornea is typically about 11.5 mm (0.45 in) in diameter, and 0.5 mm (500 μm) in thickness near its centre.
How the Human Eye Works – Step by Step - Science Notes and …
2021年1月14日 · Cornea: The cornea is the transparent outer surface of the eye. Because the eyeball is round, the cornea acts as a lens that bends or refracts light. Corneal cells regenerate quickly, because the cornea is exposed to the environment. But, the layer is thin enough to allow oxygen into the deeper structures.
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Eye Anatomy: Parts of the Human Eye - Vision Center
2024年10月23日 · The lens of the eye is the transparent lentil-shaped structure inside your eye. It’s a natural lens located behind the iris and to the front of the vitreous humor which is a clear, colorless, gelatinous mass that fills the gap between the lens and the retina.
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Cornea Function, Definition & Anatomy | Body Maps - Healthline
2018年1月19日 · The cornea is the transparent part of the eye that covers the front portion of the eye. It covers the pupil (the opening at the center of the eye), iris (the colored part of the...
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Structure and Function of the Human Eye - ThoughtCo
2024年5月28日 · Eye Structure and Function. To understand how the eye sees, it helps to know the eye's structure and how each different part functions: Cornea: Light enters through the cornea, the transparent outer covering of the eye. The eyeball is rounded, so the cornea acts as a lens. It bends or refracts light.