Aqueous humor has lower concentration of:
Lactate
Protein
Hyaluronic acid
L-ascorbic acid
Protein content of aqueous humor is much less than that of plasma. The ocular tissue surrounding the aqueous humor (especially the cornea and lens) take up glucose from aqueous humor; glycolysis by these tissues results in higher pyruvate and lactate (and lower glucose) in aqueous humor. L-ascorbic acid content of aqueous humor is 10-50 times higher as compared to plasma. (However, no ocular defects have been noted in prolonged scurvy.) The aqueous humor contains moderately high amounts of hyaluronic acid; it is kept in the depolymerized state by hyaluronidase present in the ciliary body
Special Senses