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What is viscoelastic in eye surgery?

What is viscoelastic in eye surgery?

Viscoelastics, also referred to as ophthalmic viscosurgical devices, or OVDs, are viscous substances that allow us to make phacoemulsification easier and safer. Once the first incision is made into the eye, it has a tendency to collapse as the aqueous leaks out.

What is viscoelastic used for?

The major aim for the application of viscoelastic substances in cataract surgery is prevention of corneal endothelial cell loss. This aim is fulfilled by deepening of the anterior chamber, mechanical endothelium protection against surgical trauma, absorption of ultrasound energy, and coating of intraocular lens.

Why are OVDs used during cataract surgery?

OVDs are routinely used in cataract surgery to protect delicate ocular structures, compartmentalize within the eye, pressurize the anterior chamber, and provide a faster and safer surgery with better visual recovery for our patients.

What is DisCoVisc?

Composed of 4% sodium chondroitin sulfate and 1.65% sodium hyaluronate, DisCoVisc (Alcon Laboratories, Inc.) is the first and only viscous dispersive agent combining both properties in one device. CLINICAL BEHAVIOR. The clinical behavior of OVDs is, to a great extent, conveyed by the cohesive/dispersive index (CDI).

What is dispersive OVD?

Dispersive OVDs have the consistency of honey, syrup, or molasses, and they are able to flow like thick liquids. This gives dispersive OVDs the ability to coat ocular structures well, and this coating is not easily washed away by the flow of balanced salt solution during surgery.

How long does Healon stay in the eye?

According to Dr. Lew, Healon works because of its unique chemical structure, which allows aqueous fluid to pass through while the Healon stays in place. Eventually, after about 4 or 5 days the Healon dissolves and is flushed from the eye. In time, Dr.

What is a dispersive OVD?

Is amvisc a cohesive?

Amvisc Plus Viscoelastic is molecularly engineered with a versatile range of cohesion that provides lasting chamber retention plus efficient removal at the end of the case. Cohesive versatility allows you to do what you want to do throughout the procedure, without needing a second viscoelastic.

What is the function of Capsulorhexis?

Capsulorhexis or capsulorrhexis, also known as continuous curvilinear capsulorhexis (CCC), is a technique pioneered by Howard Gimbel used to remove the capsule of the lens from the eye during cataract surgery by shear and stretch forces.

What is Healon pro?

The HEALON® PRO OVD is indicated for use as a surgical aid in cataract extraction (intra- and extracapsular), IOL implantation, corneal transplant, glaucoma filtration and retinal attachment surgery.

What is Healon used for in eye surgery?

INDICATIONS. The HEALON® PRO OVD is indicated for use as a surgical aid in cataract extraction (intra- and extracapsular), IOL implantation, corneal transplant, glaucoma filtration and retinal attachment surgery.

What is Healon made from?

The Healon OVD contains 10 mg/mL of sodium hyaluronate dissolved in physiological sodium chloride phosphate buffer (pH 7.0-7.5). This high molecular weight polymer is made up of repeating disaccharide units of N-acetyl-glucosamine and sodium glucuronate linked by ß 1-3 and ß 1-4 glycosidic bonds.