Ophthalmic Viscosurgical Device (OVD) is viscoelastic solution used in eye surgery also referred to as viscoelastic agents. Their introduction has had a profound influence on the evolution of extracapsular and phacoemulsification surgery, and their use has decreased the incidence of corneal edema as a complication of phaco surgery.
OVDs contain one or more of the following substances in varying concentrations: sodium hyaluronate, chondroitin sulfate, or hydroxypropyl methylcellulose.
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Ophthalmic Viscosurgical Device Wikipedia(Text) CC BY-SA