Ezer Diagnostic & Laser Lenses
Ezer lenses are our own EZER line of aspheric diagnostic and laser lenses built for slit-lamp biomicroscopy and indirect ophthalmoscopy. Each lens uses a computer-optimized aspheric design and high-transmittance glass with anti-reflective coatings, so ODs and MDs get a bright, distortion-free, stereoscopic view of the retina and posterior segment. Because EZER is our house brand, every lens is supported directly by us in the United States, with an in-house technical and spare-parts department standing behind it rather than a third-party importer.
Picking the right diagnostic lens comes down to your examination technique and clinical goal: whether you work at the slit lamp or with a binocular indirect ophthalmoscope, how much magnification versus field of view you need, whether you require a contact lens for the anterior chamber angle, and whether the same lens should double for laser delivery. The Ezer lens family covers the everyday range a practice or teaching clinic reaches for, and the guide below explains how to match each model to the exam in front of you.</intro>
<parameter name="how_to_choose_heading">How to choose an Ezer diagnostic lens
How to choose
- Examination technique: Non-contact fundus lenses such as the 78D and 90D are held in front of the eye at the slit lamp for biomicroscopy, while a 20D condensing lens is used handheld with a binocular indirect ophthalmoscope for wide-field views. A three-mirror lens is a contact lens coupled to the cornea for the angle and peripheral retina. Start by deciding which instrument and technique the lens has to serve.
- Magnification vs. field of view: Higher-power non-contact lenses trade magnification for a wider field. The 90D gives a broad view that is easy to acquire, the 78D is the balanced all-arounder favored for detailed optic disc and macula work, and the 20D delivers the wide, lower-magnification field indirect ophthalmoscopy is known for. Choose the balance that fits how you screen versus how you scrutinize.
- Small or undilated pupils: If you frequently examine patients with small or poorly dilating pupils, a wider-field lens like the 90D makes it easier to get a usable fundus view through a limited aperture, which matters for quick screening and follow-up visits.
- Anterior angle and peripheral retina: For gonioscopy of the anterior chamber angle plus evaluation of the peripheral retina, a three-mirror contact lens is the multipurpose tool. If glaucoma angle assessment or peripheral break detection is part of your workflow, the EDL-3M covers ground the non-contact fundus lenses cannot.
- Diagnostic-only vs. diagnostic and laser: Several models in the line are rated for both diagnosis and laser delivery, so a single lens can support slit-lamp photocoagulation or focal treatment as well as routine exams. If you deliver laser in-office, choose a lens designated for both roles rather than a diagnostic-only lens.
- Optics, build, and support: Look for a genuine aspheric design, high-transmittance glass, and effective anti-reflective coating for clean images, plus a comfortable holding ring for dynamic funduscopy. Just as important is who stands behind the lens: as the EZER provider we offer a US warranty, in-house service, and spare parts, and can advise on new versus refurbished options when you request a quote.
The Ezer lens lineup
All four Ezer lenses share the same aspheric, high-transmittance optical platform; they differ in the exam they are built for. Use the table to match a model to your technique, then request a quote for pricing and new-versus-refurbished availability.
| Model | Lens type | Best for |
|---|---|---|
| EDL-90D | Non-contact slit-lamp fundus / laser lens | Wide-field posterior-segment screening and small or undilated pupils |
| EDL-78D | Non-contact slit-lamp fundus / laser lens | The balanced everyday choice for detailed optic disc and macula views |
| EDL-20D | Indirect ophthalmoscopy (BIO) condensing lens | Wide-field peripheral retina exams with a binocular indirect ophthalmoscope |
| EDL-3M | Three-mirror contact lens | Gonioscopy of the anterior chamber angle plus peripheral retina and laser |
Frequently asked questions
What is the difference between the EDL-78D and EDL-90D lenses? Both are non-contact aspheric slit-lamp fundus lenses, but they balance magnification and field of view differently. The 78D is the versatile all-arounder many clinicians pick if they own only one lens, giving strong magnification for optic disc and macula detail. The 90D offers a wider, easier-to-acquire field and is especially useful for patients with small or undilated pupils.
Do I need a contact or a non-contact lens? Non-contact lenses such as the 78D, 90D, and 20D are held in front of the eye and never touch the cornea. A three-mirror lens like the EDL-3M is a contact lens coupled to the eye and is what you need for gonioscopy of the anterior chamber angle and for careful peripheral retina evaluation. Many practices keep both types on hand for different exams.
Can Ezer lenses be used for laser treatment as well as diagnosis? Several models in the line are designated as diagnostic and laser lenses, meaning the same lens can support slit-lamp laser delivery in addition to routine examination. If in-office laser is part of your workflow, choose a model rated for both roles; our team can confirm which lens fits your laser and procedure when you request a quote.
Are these lenses covered by a US warranty and service? Yes. EZER is our own brand, so Ezer lenses are backed by a US warranty and supported by our in-house technical and spare-parts department. You are dealing with the provider directly, not a third-party importer, which keeps warranty and service straightforward.
Do you offer new and refurbished lenses, and how do I get pricing? We can advise on new and, where available, quality-checked refurbished options to fit your budget. Pricing is handled through Request a Quote so we can confirm current availability and the right lens for your slit lamp or indirect ophthalmoscope before you order.
