Description

The 20D Large Lens by Volk is an essential tool for ophthalmologists, designed specifically for indirect ophthalmoscopy. This handheld lens is renowned for its precision and clarity, making it ideal for comprehensive retinal examinations. Its primary function is to provide detailed visualization of the central and mid-peripheral retina, crucial for diagnosing and treating various ocular conditions.

Optical Excellence

• Design: The lens features a double aspheric, biconvex design, ensuring high-quality optical performance.
• Dioptric Power: With a dioptric power of +20D, it offers approximately 3.13x image magnification, providing a balanced view of the retina.
• Field of View: The lens offers a field of view ranging from 46° to 60°, allowing for thorough examination of the macula, optic nerve, and peripheral retinal anomalies.

Practical Features

• Working Distance: A working distance of 50 mm from the cornea facilitates ease of use during dynamic examinations, particularly beneficial in pediatric cases or when patient eye movement is involved.
• Material: Constructed from high-quality, low dispersion glass with anti-reflective coatings, the lens minimizes reflections and enhances image clarity.

Versatility and Customization

• Color Options: Available in a variety of colors including Black, Gold, Purple, Silver, Green, Blue, Red, and Champagne Gold.
• Sterilization Options: Comes in autoclave sterilizable or single-use designs, catering to different clinical needs.
• Accessories: Includes a single-lens case with optional engraving, providing personalization up to 14 characters on the lens and 17 on the case.

Clinical Advantages

The 20D Large Lens is widely recognized for its ease of manipulation and effectiveness in general diagnostic examinations. It is particularly useful in situations where slit lamp examination is not feasible, offering a compromise between magnification and field of view. This makes it suitable for examining patients with nystagmus or those requiring panoramic retinal views.

Specialized Use

In addition to general diagnostics, the lens is valuable in fundus biomicroscopy for evaluating conditions such as glaucoma, maculopathy, and peripheral retinal disease. Some models include advanced features to further enhance optical quality and reduce reflections, maintaining Volk's reputation for excellence in ophthalmic lenses.