Ophthalmic Viscoelastic Devices; Viscous Substances Used To Make Phacoemulsification Easy and Safe


 

  Ophthalmic viscoelastic devices play an important role in ophthalmic (eye) surgeries, such as vitreoretinal surgery, glaucoma surgery, cataract surgery, and corneal transplantation surgery. However, the selection of ophthalmic viscoelastic devices is based on both the surgical need and preferences of the surgeons. Ophthalmic viscoelastic devices, or viscoelastic, are viscous substances that allow surgeons to make phacoemulsification easier and safer. Viscoelastic are clear, non-active, and gel-like solutions with elastic and viscous properties.

  A viscoelastic solution or viscoelastic agent is used to help make cataract surgical procedures more successful. The major application of viscoelastic in ophthalmic surgery, such as cataract surgery is the prevention of corneal endothelial cell loss. This is managed to accomplish by strengthening the anterior chamber, absorbing ultrasound energy, protecting the mechanical endothelium from surgical trauma, and coating the intraocular lens.      These viscoelastic agents or solutions are used to create and maintain space in the anterior chamber of the eye.

  Thus, with the increasing prevalence of ophthalmic diseases, such as cataracts and glaucoma, the demand for ophthalmic viscoelastic devices is also increasing. For example, ophthalmic viscoelastic devices are routinely used in cataract surgery to protect delicate ocular structures, pressurize the anterior chamber, compartmentalize within the eye, and provide a safer, faster surgery with better visual recovery. Ophthalmic viscoelastic devices mainly contain sodium hyaluronate, hydroxypropyl methylcellulose, and chondroitin sulfate.

  Moreover, according to the Association for Research in Vision and Ophthalmology, dry eye is one of the most common diseases among the global population. In Japan, sodium hyaluronate ophthalmic solutions have been used for many years to treat dry eyes. There are basically two main categories, such as cohesive and dispersive ophthalmic viscoelastic devices. The major role of these devices is to create and maintain volume in the anterior chamber of the eye, and to protect the corneal endothelium during the ophthalmic procedures.

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