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Ophthalmic Viscosurgical Devices (OVDs)

Ophthalmic viscosurgical devices (OVDs) are specialized substances used during eye surgery to maintain the shape of the eye and protect its delicate structures. They are clear, gel-like materials that help to create space in the eye, act as a lubricant, protect tissues from damage, and facilitate surgical procedures.
There are two main types of OVDs: cohesive and dispersive. Cohesive OVDs have a high viscosity (thickness) and stick together when pressure is applied, making them useful for positions that require longer periods of stability. Dispersive OVDs have a lower viscosity and spread out when pressure is applied.
Commonly used OVDs include sodium hyaluronate (also known as hyaluronic acid), hydroxypropyl methylcellulose, chondroitin sulfate, and methylcellulose.
Ophthalmic surgeries where OVDs may be used include cataract surgery, glaucoma surgery, corneal transplantation procedures, vitrectomy (for retinal detachment repair), intraocular lens implantation following cataract removal or trauma to the eye.