Description

The 20D Large Lens by Volk Optical is an essential tool for ophthalmologists, renowned for its precision and versatility in retinal examinations. This non-contact, indirect ophthalmoscopy lens is designed to provide exceptional clarity and a comprehensive field of view, making it ideal for both general diagnostics and specific procedures such as scleral buckling surgery.

Key Features

• Magnification and Field of View: With a dioptric power of +20, the lens offers a field of view ranging from 46° to 60°, and an image magnification of approximately 3.13x. This balance allows for detailed visualization of the retina, including the optic disc and macula.

• Optical Design: The lens features patented double aspheric glass optics, expertly correcting for field curvature, astigmatism, and other aberrations. This results in high image quality and reduced distortion, enhancing diagnostic accuracy.

• Working Distance: A working distance of 47–50 mm from the cornea provides comfortable use, while maintaining excellent stereopsis for depth perception.

Versatility and Design

Available in a variety of colors, the 20D Large Lens can be tailored to personal preference or practice aesthetics. Its durable design includes options for single-use or autoclave sterilizable versions, ensuring hygiene and longevity.

Cleaning and Maintenance

Proper maintenance is crucial for the lens's performance. Recommended cleaning involves using mild, pH-neutral detergents and avoiding abrasive materials. Disinfection can be achieved with approved medical wipes or solutions, while sterilization is compatible with systems like STERRAD® and steam autoclaving for applicable models.

Storage and Handling

Storing the lens in a clean, dry environment and using appropriate cases can prevent damage. Regular inspection for chips or cracks is advised to ensure continued effectiveness.

Legacy and Availability

Though no longer produced by Nikon, Japan, the lens continues to be available through Volk Optical, maintaining its status as a trusted choice among eye care professionals. Its enduring popularity underscores its effectiveness in providing high-quality retinal imaging, making it a staple in ophthalmic practices worldwide.