SciMed
3-Mirror Gonioscope Lens (Goldmann-Style) — 59° / 66° / 73° Mirrors + Central Axis, Fundus + Angle + Peripheral Retina, With Case
3-Mirror Gonioscope Lens (Goldmann-Style) — 59° / 66° / 73° Mirrors + Central Axis, Fundus + Angle + Peripheral Retina, With Case
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3-mirror Goldmann-style gonioscope lens — the versatile all-in-one slit-lamp contact lens for anterior chamber angle exam, peripheral retinal biomicroscopy, AND posterior pole viewing through a single instrument. Three mirrors angled at 59°, 66°, and 73° arranged at 120° intervals give complete angle survey plus peripheral retinal views by rotating the lens. Central axis window views the posterior pole (macula + optic nerve) directly. Includes secured protective case. $99.99 direct — versus $275-$495 for Volk G-3 / Ocular Latina Three-Mirror / OCS branded equivalents.
The 3 mirrors + central axis — what each views
| Element | Angle | Views |
|---|---|---|
| Central axis | 0° (through lens center) | Posterior pole — macula, optic nerve head, central retina |
| Mirror 1 | 73° tilt | Equatorial retina (mid-periphery) |
| Mirror 2 | 66° tilt | Ora serrata + far peripheral retina |
| Mirror 3 | 59° tilt | Anterior chamber angle (gonioscopy — trabecular meshwork, Schwalbe's line, ciliary body band) |
Rotate the lens 120° twice to view all 360° of angle + periphery. With all 4 viewing elements in one lens, the 3-mirror Goldmann is the "Swiss Army knife" of slit-lamp contact lenses — one lens replaces gonio + peripheral retinal lens + posterior fundus lens for many use cases.
Applications
- Comprehensive fundus exam — posterior pole + full 360° peripheral retina in one lens exchange
- Gonioscopy — anterior chamber angle assessment for glaucoma (POAG vs PACG differentiation)
- Peripheral retinal survey — tears, detachment, lattice degeneration, retinoschisis
- Diabetic retinopathy full retinal screening — from macula to ora serrata in one exam
- Post-vitrectomy comprehensive check — periphery + posterior in a single visit
- Retinal laser therapy planning — mapping periphery for prophylactic barrage laser
- Uveitis workup — anterior chamber angle findings + retinal periphery for granuloma / snowball assessment
- High-myope surveillance — comprehensive periphery + posterior monitoring in annual follow-up
- Optometry teaching — one lens teaches the anatomy of gonio + fundus + periphery
Specifications
| Type | Goldmann-style 3-mirror contact lens (indirect ophthalmoscopy + gonioscopy combined) |
|---|---|
| Mirror configuration | 3 mirrors at 59° / 66° / 73° from optical axis, arranged at 120° intervals |
| Central axis | Direct posterior pole viewing (macula + optic disc) |
| Coverage | 360° angle + 360° peripheral retina with two 120° lens rotations |
| Material | Optical glass with anti-reflection coating |
| Contact | Requires coupling gel (methylcellulose 2% or hypromellose Gonak-equivalent) |
| Sterilization | Cold sterilization (10-min soak in EPA-approved high-level disinfectant) or wipe-clean with alcohol-free lens solution |
| Storage | Secured protective case included |
3-mirror vs 2-mirror gonio vs 4-mirror dynamic — which do you need?
| Lens | Best for | Coupling gel needed | Compact travel case |
|---|---|---|---|
| 4-mirror dynamic (Zeiss / Sussman) | Indentation gonioscopy — differentiates appositional vs synechial angle closure | No (dry contact) | Yes |
| 2-mirror gonio (SciMed $99.99) | Angle exam only, small-fissure + pediatric eyes | Yes | Yes |
| 3-mirror Goldmann (this lens) | All-in-one — angle + periphery + posterior in ONE lens | Yes | Yes |
Practical guidance: a well-equipped glaucoma/retina practice owns all three. For a starter practice or NGO surgical mission where budget is limited to ONE gonio-family lens, the 3-mirror Goldmann is the highest-value pick — it does 80% of what specialized 2-mirror + 4-mirror + peripheral lenses do combined.
Comparison to premium branded 3-mirror lenses
| Brand / Model | Mirrors | Coating | Price |
|---|---|---|---|
| Volk G-3 | 3 (59° / 66° / 73°) | AR + antifog | $375-$495 |
| Ocular Latina Three-Mirror | 3 (59° / 66° / 73°) | Ocular OQM coating | $325-$425 |
| OCS 3-Mirror Universal | 3 (59° / 66° / 73°) | AR multi-layer | $275-$350 |
| SciMed 3-Mirror | 3 (59° / 66° / 73°) | AR coated | $99.99 |
Best for
- Glaucoma specialists (comprehensive angle + retinal exam in one lens)
- Retina specialists (posterior pole + full periphery in one lens exchange)
- General ophthalmology + optometry (all-in-one diagnostic lens)
- Optometry + ophthalmology residency programs (teaches full slit-lamp lens technique)
- Community + rural eye clinics (one lens = 3-in-1 exam capability)
- International eye NGOs — Aravind, LV Prasad, Fred Hollows, Sightsavers, ORBIS surgical missions
- International DDP procurement for global eye-care programs
Buying for a practice, residency, or eye NGO?
- Volume pricing on 3+ lenses (multi-provider practice or residency cohort)
- Net-30 invoicing for verified academic + NGO + practice accounts
- SAM.gov / VA compliant for federal + academic ophthalmology
- Bundle with SciMed 20D + 78D + 90D + 2-Mirror Gonio — complete indirect biomicroscopy + gonioscopy set at package discount
- International DDP shipping — global eye NGO + academic procurement
FAQ
How is the 3-mirror Goldmann different from the 2-mirror gonio?
2-mirror = angle exam ONLY. 3-mirror Goldmann = angle exam + peripheral retina + posterior pole via central axis. If your primary use is glaucoma angle work + tight fit for pediatric/narrow-fissure eyes, the 2-mirror wins (smaller footprint). If you want ONE lens that does it all for adult general eye exams, the 3-mirror Goldmann is the pick.
Coupling gel compatibility?
Standard 2% methylcellulose (Goniosol, Gonak, generic hypromellose 2.5%). Compatible with all commercial gonio coupling gels. NOT compatible with saline (too runny) or ophthalmic viscoelastic (too thick).
How does this compare to Volk G-3?
Volk G-3 is the industry gold standard 3-mirror lens — 20+ years professional use, premium AR + antifog coating, tight machining tolerances. This SciMed 3-mirror matches the optical prescription (same 59°/66°/73° mirror geometry) at ~1/4 the price. Volk's coating longevity + longer warranty are the meaningful differences. For residency + community + NGO markets, SciMed is the value pick.
Sterilization protocol?
Between patients: 10-min immersion in EPA-approved high-level disinfectant (Cidex OPA, hydrogen peroxide 3%). Do NOT autoclave (destroys AR coating + delaminates glass). Do NOT use alcohol-based disinfectants (degrades coating). Store dry in included case.
Learning curve for a resident starting on the 3-mirror?
Steeper than 90D (which is non-contact + no gel + no rotation). The 3-mirror requires learning: (1) coupling gel application, (2) 120° rotations between the 3 mirrors, (3) mental map from mirror view back to retinal location. Typical mastery: 15-25 supervised exams. Once mastered, it's a lifelong core skill.
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