20D Aspheric indirect ophthalmoscopy lens, Slit lamp retina lens
20D Aspheric Indirect Ophthalmoscopy Lens – Precision Retina Imaging for Slit Lamp Microscopy
CE Certified | ISO 13485 Compliant | Professional-Grade Optics
Elevate your diagnostic capabilities with the 20D Aspheric Indirect Ophthalmoscopy Lens—engineered for exceptional clarity, wide-field retinal visualization, and reliable performance in every examination. Whether you're screening for retinal detachment, diabetic retinopathy, or macular degeneration, this lens delivers the sharp, high-contrast imaging you need to make confident clinical decisions.
Why Choose the 20D Retina Lens?
- Superior Optical Clarity: Aspheric design minimizes distortion and delivers crisp, high-resolution fundus images.
- Wide Static Field of View: 46° field of view captures a broad retinal area in a single view.
- Ergonomic Working Distance: 50.0 mm working distance offers comfortable positioning for both doctor and patient.
- Precision Engineering: 3.13X image magnification and 0.32X laser spot magnification for accurate diagnostics and treatment planning.
- Durable & Portable: Lightweight black casing with protective case for safe storage and transport.
- Certified Quality: Manufactured under ISO 13485 standards and CE marked for professional medical use.
Product Specifications
| Model | 20D |
| Color: | Black |
| Net weight: | g (1pc) |
| Weight with case: |
g (1pc) |
|
Case size: |
8x8x4cm (1pc) |
| Gross weight: | g (1pc), g (2pcs) |
| Packing size: | 17x 139x 9cm (2pcs) |
Product Overview
Retina lenses (for Slit Lamp) are essential diagnostic tools used to observe the patient's fundus and examine the internal structures of the eye through the pupil in coordination with a Slit Lamp microscope. This lens enables doctors to make accurate diagnoses of eye diseases and other ocular conditions with confidence.
The products comply with the relevant provisions of ISO 13485, ensuring consistent quality and safety for clinical use.
Technical Specifications of Retina Lenses
| Specification | Image Magnifiers | Laser spot magnifiers | Static FOV α(°) | Working distance (mm) | Clear Aperture | Dimension (mm) |
| 20D | 3.13X | 0.32X | 46° | 50.0 | 48.0 |
Φ56x20 |
| 78D | 0.93X | 1.08X | 81.4° -97° | 8.0 | 26.0 |
Φ33x15 |
| 90D | 0.76X | 1.32X | 74.2° -89° | 7.0 | 21.0 |
Φ27x13 |
How to Use the 20D Retina Lens
Users should be familiar with the operation of retina lenses and slit lamp microscopes. Follow these steps for optimal results:
- Align the lens: Position the lens so it aligns with the patient's pupil. Ensure the shield ring faces the doctor and the other side faces the patient's eye.
- Maintain proper distance: Keep sufficient distance between the lens and the patient's eye so that the retinal image size matches the diameter of the lens.
- Optimize lighting: Minimize light brightness as much as possible to reduce reflectiveness and improve imaging contrast.
Cleaning and Maintenance
Cleaning: Wipe the lenses with soft cotton dipped in absolute alcohol.
Warning: Do not expose the lenses to high pressure or boil them for sterilization.
Important Notes
- Do not store or use this equipment in environments with flammable, explosive, high-temperature, high-humidity, or dusty conditions.
- Use only in a clean room and maintain the product in a clean and dry state.
- Do not wipe the surface of the lens with hands or hard objects.



