The anterior and posterior chambers are the first of three liquid-filled chambers in the eye. The former is between the cornea and the iris, the latter between the iris and the lens. The liquid here helps refract the light bought in through the cornea. This "aqueous humor" has a viscosity almost identical to water (aqua). Aqueous humor is generated from blood plasma and is renewed every hour. Its presence in the anterior and posterior chambers creates pressure that helps the eye maintain its shape. Too much pressure in these chambers is the cause of glaucoma.
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