made from cross-linked HA have been effectively used to prevent such adhesions from forming. Furthermore, the adhesion of bacteria to biomaterials can induce infections and constitute a great risk to the patient; with this in mind, esterified HA has also been used to prevent bacterial adhesion to dental implants, intraocular lenses, and catheters (Leach and Schmidt, 2004). 7.6. Ophthalmology HA, a ponent of the vitreous humor of the eye, has found many essful applications in ophthalmologic surgery. HA is particularly useful as a spacefilling matrix in the eye; thus, intraocular injection of HA during surgery is used to maintain the shape of the anterior chamber. Furthermore, HA solu - tions also serve as a viscosity-ponent of eye drops and as an adjuvant to eye tissue repair.