human eyeball structure model 3 times 6 times magnification anatomy teaching aids biological physiology experiment science and education instrument 人体眼球结构模型 3 倍 6 倍放大解剖教具 生物生理实验科教仪器

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The structure of the eyeball consists of the eyeball, the eyeball wall, and its contents, forming a roughly spherical main part of the eye, which is located within the orbital cavity.

The eyeball wall is layered, with the fibrous membrane, vascular membrane, and retina in sequence from the outside to the inside.

The contents of the eye are some colorless, transparent refractive structures within the eye, including the lens, aqueous humor, and vitreous body, which together with the cornea form the refractive system of the eye.

The eyeball is approximately spherical, formed by the combination of two spheres with different radii of curvature. The eyeball in adults...