Efficacy of the soft-shell technique using Viscoat and Hyal-2000

Area of Science:

• Ophthalmology
• Surgical Techniques
• Corneal Science

Background:

• Cataract surgery can lead to corneal endothelial cell damage.
• Ophthalmic viscosurgical devices (OVDs) are used to protect tissues during surgery.
• The soft-shell technique employs multiple OVDs to enhance protection.

Purpose of the Study:

• To evaluate the efficacy of the soft-shell technique using Viscoat and Hyal-2000 in reducing corneal endothelial cell damage during cataract surgery.
• To compare the protective effects of different OVDs on corneal endothelium.

Main Methods:

• A study involving 252 eyes of 230 cataract patients classified by nuclear opacity grade (1-4).
• Patients were divided into four groups based on OVD used: soft-shell (Viscoat + Hyal-2000), Viscoat alone, Hyal-2000 alone, or Provisc alone.
• Postoperative evaluation included visual acuity, corneal endothelial cell density, corneal thickness, and intraocular pressure (IOP).

Main Results:

• A significantly lower rate of endothelial cell loss was observed in eyes with nuclear opacity grade >=4 when using the soft-shell technique compared to other OVD groups.
• No significant differences in cell loss were found for nuclear opacity grade <=3.
• Visual acuity, corneal thickness, and IOP showed no statistically significant differences across groups.

Conclusions:

• The soft-shell technique utilizing Viscoat and Hyal-2000 provides significant protection for corneal endothelial cells in cataract surgery patients with grade >=4 nuclear opacity.
• This technique is particularly beneficial in managing more complex cataract cases to preserve endothelial health.