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119

OVDs

Viscosurgical devices (OVDs)

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.

Dispersive

  • the ability to flow like thick liquids
  • the consistency of syrup

Cohesive

  • more solid than liquid
  • the consistency of gelatin

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