The aqueous humor plays an important function in the health of the anterior segment of the eye, serving to both nourish the eye and maintain the structural integrity of the anterior chamber. Although aqueous humor production and outflow has been extensively studied, little has been done to investigate its nourishing effects. Prior studies have only quantified electrolytes and basic molecules in the aqueous humor of normal humans. Although the protein concentration in the aqueous humor is only 0.2 mg/ml, proteins play an important role in the health of the anterior segment. More specifically, the interactions of different growth factors regulate most living cells in the eye along with the rest of the human body.1 With the advent of multiplex-bead testing, such as Luminex (Austin, TX), it is now possible to simultaneously test multiple factors on a small volume sample such as aqueous humor tap.
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