Description

Volk Optical's 20D Large Lens is a renowned tool in the field of ophthalmology, specifically crafted for indirect ophthalmoscopy. This handheld, non-contact lens is designed to deliver exceptional optical performance, making it an essential instrument for comprehensive retinal examinations.

Optical Excellence

• Dioptric Power: +20D
• Design: Double aspheric, biconvex glass optics
• Field of View: 46°/60°
• Image Magnification: Approximately 3.13x

The lens provides a well-balanced combination of magnification and field of view, allowing detailed visualization of the retina up to the mid-peripheral region. It is corrected for field curvature, astigmatism, aberrations, and coma, ensuring clear views of the optic disc and macula.

Specifications

• Working Distance: 47–50 mm from the cornea
• Clear Aperture: Ø47 mm
• Overall Dimensions: Ø56 x 20 mm

These specifications contribute to its effectiveness in general diagnostic exams, fundus examination, and optic disc size estimation. Optimal imaging requires pupil dilation, enhancing its diagnostic capabilities.

Material and Design

Available in a variety of colors, including Black, Blue, Gold, and more, the lens features durable glass optics. The ring color may fade to natural aluminum after repeated sterilization, a change that is purely cosmetic.

Accessories and Customization

Each lens comes with a single-lens case and offers optional engraving, allowing up to 14 characters on the lens and 17 on the case. This personalization adds a unique touch for practitioners.

Cleaning and Sterilization

The lens supports rigorous cleaning and sterilization protocols:

• Cleaning: Use mild, pH-neutral detergent with a soft, lint-free cotton cloth.
• Disinfection: Compatible with high-level disinfectants like Cidex OPA and CaviWipes.
• Sterilization Methods: Ethylene Oxide, Steam Sterilization, Sterrad®, and V-Pro® systems.

Avoid using alcohol, peroxide, or acetone on contact elements. Proper handling and storage in a clean, dry environment are recommended to maintain its condition.

Certifications

The 20D Large Lens is certified with CE, FDA, and ISO13485, reflecting its adherence to high-quality standards. These certifications underscore its reliability and effectiveness in clinical settings.

Usage Precautions

Practitioners are advised to follow manufacturer instructions for maintenance and to use appropriate sterilization cases to prevent damage. Despite potential discoloration of colored rings due to disinfectants, the lens's functionality remains unaffected.

Volk Optical's 20D Large Lens continues to set the standard in ophthalmic diagnostics, offering unparalleled clarity and precision for eye care professionals worldwide.