Description

The 30D Lens is an essential tool for professionals in the field of ophthalmology, specifically designed for indirect ophthalmoscopy. This high-diopter, aspheric lens provides a comprehensive view of the retina, making it particularly valuable for examining the peripheral retina in patients with small or undilated pupils, such as pediatric patients.

Key Features

• Wide Field of View: Offers a panoramic view of the retina, allowing for thorough examination and diagnosis of peripheral retinal conditions such as tears, detachments, and neovascularization.
• Moderate Magnification: Designed to work effectively through small pupils, providing clear imaging for accurate assessment.
• Versatile Use: Compatible with both binocular indirect ophthalmoscopes and slit-lamp biomicroscopes, suitable for static and dynamic examinations.

Design and Comfort

Available in two sizes, large and small, the 30D Lens features a small profile that enhances patient comfort and cooperation during examinations. The smaller size allows for easier manipulation around the orbit, providing ergonomic benefits for the practitioner.

Optical Specifications

• Field of View:
• Large Size: 58°/75°
• Small Size: 44°/57° or 46°/60°
• Image Magnification:
• Large: 2.15x
• Small: 2.09x–2.10x
• Laser Spot Magnification:
• Large: 0.47x
• Small: 0.48x

Construction

Crafted from glass with aspheric double optics, the lens offers high-resolution imaging. The higher refractive index of glass compared to plastic enhances image quality, making it a reliable choice for detailed retinal examinations.

Handling and Maintenance

The lens is biconvex and handheld, with ergonomic ring sizes to suit user preference. Proper maintenance includes storing the lens in its case when not in use and cleaning with recommended solutions to preserve optical clarity.

Additional Insights

With a working distance from the cornea typically around 30 mm, the 30D Lens provides half the stereopsis of normal vision, contributing to its specialized imaging capabilities. Its dioptric power of 30 diopters distinguishes it within the family of condensing lenses, offering a balance between field of view and magnification that complements other lenses like the 20D and 25D.

This lens is a vital component in the toolkit of ophthalmic professionals, enhancing the ability to conduct comprehensive retinal assessments with precision and ease.