Characterizing Opthalmic Viscosurgical Devices (OVDs) Using A Aotational Rheometer
Application Note Apr 01, 2015
Malvern Instruments Limited
Ophthalmic Viscosurgical Devices (OVDs) are viscoelastic solutions or gels used to protect the corneal endothelium from mechanical trauma and to maintain intraocular space during eye surgery. They usually contain one or more of the following components; hyaluronic acid or its sodium salt, chondroitin sulfate or methylcellulose. As these materials are polymeric then they tend to be viscoelastic with their properties strongly dependent on factors such as concentration, molecular weight and molecular architecture as well as intra- or inter- molecular interactions in solution.