Description

The HOYA Vivinex™ Toric Intraocular Lens (IOL), Model XY1AT4, is expertly crafted to address astigmatism correction during cataract surgery. This lens is part of HOYA's renowned Vivinex™ series, known for its advanced design and material technology, aimed at enhancing visual outcomes and reducing postoperative complications.

Advanced Optic Design

• Biconvex Aspheric Optic: Features an aspheric anterior surface and a toric posterior surface, designed to improve visual clarity by compensating for corneal spherical aberration.
• Edge Design: The sharp, square, and textured optic edge minimizes posterior capsule opacification (PCO), a common postoperative issue.

Material and Light Filtration

• Glistening-Free Acrylic: Made from hydrophobic acrylic material, ensuring long-term optical clarity.
• UV and Blue Light Filters: Integrated filters provide additional protection for the eye.

Haptic Design for Stability

• Textured Haptic Surface: Crafted from the same acrylic material, enhancing the lens's positional stability within the eye.

Dimensions

• Optic Diameter: 6.00 mm
• Overall Length: 13.00 mm

Power Specifications

• Spherical Power Range: +10.00 to +30.00 diopters (D), in 0.50 D increments.
• Cylinder Power (Toric): At the IOL plane, ranges from 1.00 to 6.00 D. For the XY1AT4 model, the cylinder power is 2.25 D at the IOL plane and 1.56 D at the corneal plane.

Rotational Stability

• Exceptional Stability: Median rotation of 1.1° with over 96% of lenses maintaining ≤5° rotation post-implantation, ensuring consistent visual performance.

Optical Constants

• Nominal A-Constant: 118.9
• Optimized for Various Formulas: Including Haigis, Hoffer Q, Holladay 1, and SRK/T, facilitating precise lens power calculations.

Injector System

• Preloaded Systems: Available in Vivinex™ iSert® or multiSert™ injectors, suitable for a recommended incision size of 2.20 mm.

Special Features

• Active Oxygen Processing: Combined with a square edge design to further reduce PCO.
• Surface Regularity: Ensures clarity and supports precise cylinder power calculation with the HOYA Toric Calculator.

Clinical Benefits

• High Rotational Stability: Clinically proven, along with lower PCO and Nd:YAG capsulotomy rates compared to other IOLs.
• Long-Term Clarity: Maintained through glistening-free material and superior biocompatibility.

Intended Use

Designed for patients undergoing cataract surgery who require astigmatism correction, the HOYA Vivinex™ Toric IOL XY1AT4 offers a reliable solution with proven clinical benefits. Availability may vary by country, and it is advisable to consult local guidelines and Instructions For Use for comprehensive indications and contraindications.