The vitreous (also known as vitreous humor or vitreous body) is mostly water (99%), with the rest of its makeup consisting of hyaluronic acid and collagen. The vitreous sits behind the lens and fills the posterior chamber to the retina. The vitreous remains mostly unchanged from birth, as it is not circulated or replaced. The vitreous is in contact with the retina and provides some support to keep it in place. It adheres to the optic nerve head, peripheral retina ...

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