Double Aspheric Lens
This is a kind of double aspheric lens, it will help the ophthalmologist observe clearer view of the retina of the eye.
Characteristics
- Lens made of superior optical glass with High-transmittance, less stray light, and perfect realistic images
- The lens surface adopts ultra strong coating, which is wear-resistant and shatterproof
- Lens protection is waterproof and stain resistant, making it easier to clean
Aspheric Lens
Aspheric lenses are widely used in ophthalmic equipment. Their complex curved surfaces, similar to those of the human eye, can simulate human eye function, reduce aberrations, and thus improve visual function. Our aspheric lenses are primarily used to assist with slit lamp examinations and indirect ophthalmoscopy for fundus examinations.
Specifications
| Diopters | Lens Material | Image Mag ratio | Laser Spot Mag ratio | Static FOV | Dynamic FOV | Working Distance | Clear Aperture |
| 20D | High-transmittance Glass | 2.92X | 0.34X | 52° | / | 45mm | 47.5 |
| 78D | High-transmittance Glass | 0.98X | 1.02X | 81° | 145° | 8mm | 27.5 |
| 90D | High-transmittance Glass | 0.75X | 1.34X | 90° | 150° | 6mm | 20.2 |
Double Aspheric Lens
20D
Our 20D aspherical lens extends the working distance for non-contact examinations, often used with a slit lamp for fundus examinations, providing a wide field of view.
78D
Our 78D aspherical lens provides high magnification and corrects for field curvature, astigmatism, and aberrations, enabling better visualization of the optic disc and macula.
90D
Our 90D aspherical lens has high magnification, providing high-definition and detailed observation field of view, suitable for detailed diagnosis and evaluation of eye diseases
Lens and Case
Each of our aspheric lenses undergoes precision polishing and testing to become a qualified ophthalmic examination lens. Each aspheric lens has a beautifully designed individual packaging to fully protect the lens surface.
We offer customization services, so if you would like to customize your own aspheric lens, please don’t hesitate to contact us.
Aspheric Lens Applicaction (3)
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Aspheric lenses are often used with slit lamps as accessories to examine the fundus.
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Aspheric lenses can also be used with indirect ophthalmoscopes to examine fundus diseases。
Aspheres, as the name implies, are not spherical, in geometry, that is, there is no uniform radius of the sphere, which is called the radius of curvature. The design of aspherical lenses so far means that the diopter is constantly changing from the optical center area to the edge part, and the change curve is a parabolic shape, which determines that the luminosity of this type of lens from the optical center to the surrounding area is gradually reduced.
Much Clearer
After the special coating treatment of aspherical lenses have perfect visual performance, presenting a clearer and more comfortable visual effect.
Much Lighter
The lens is light and thin, and you can hardly feel it after wearing aspherical lenses.
More Natural
The aspherical surface design is more natural, less visual deformation, and more realistic.
Double aspheric lens is the basic design of aspheric lens on both sides of the lens, so that it can better show the performance of the lens.
This double aspheric lens is used to observe the retina of the eye together with slit lamp microscope.