Description

The 78D lens is an essential tool for ophthalmic professionals, designed specifically for slit-lamp biomicroscopy. This non-contact, double aspheric lens is widely recognized for its ability to provide detailed examinations of the retina, particularly the posterior pole, optic nerve head, and macula.

Optical Excellence

• Design: The lens features double aspheric optics, ensuring clear and undistorted views of the retina and optic disc.
• Magnification: Offers image magnification typically around 0.93x, with some versions at 0.77x, depending on the manufacturer.
• Field of View: Provides a dynamic field of view ranging from 81° to 97°, allowing comprehensive retinal diagnostics.

Practical Specifications

• Working Distance: Maintains an 8 mm distance from the cornea.
• Image Orientation: Produces a stereoscopic, inverted, and reversed image.
• Material: Constructed from high-quality optical glass, compatible with all standard slit-lamp biomicroscopes.

Versatile Use Cases

Ideal for:

• Examining the central retina, optic nerve head, macula, and retinal arcades.
• Diagnosing and monitoring conditions such as glaucoma and maculopathy.
• Suitable for both routine and specialized ophthalmic diagnostics.

Recommended Users

This lens is invaluable for ophthalmologists, optometrists, retina specialists, and other eye care professionals, including those in veterinary and educational settings.

Usage Guidelines

• Pupil Dilation: Recommended for optimal examination but usable with undilated pupils.
• Technique: Held close to the patient’s eye during examination, enhancing the angle of view without contact.
• Laser Treatment: Suitable for general diagnosis and retinal laser treatment.

Maintenance and Care

Cleaning

• Use a mild, pH-neutral detergent with a soft cotton cloth.
• Rinse with sterile, distilled, or deionized water.
• Dry with an ultra-soft, low-lint cloth.

Disinfection

• Compatible with disinfectants like Cidex OPA and Glutaraldehyde.
• Avoid using alcohol, peroxide, or acetone on contact elements.

Sterilization

• Compatible with ETO, Steam, Sterrad®, V-Pro, and Sterizone VP4 systems.
• Use a sterilization case to prevent damage.

Design Variations

• Color Options: Available in colors such as Black, Blue, Gold, and more.
• Single-Use Models: Some versions, like Katena® Osher 78D, are available as sterile, single-use lenses.
• Accessories: May include a lens case with options for custom engraving.

Manufacturer and Regulatory Information

Produced by leading manufacturers such as Volk Optical and Ocular Instruments, the 78D lens is US FDA approved for diagnostic and therapeutic ophthalmic procedures, ensuring reliability and quality in clinical settings.