SciMed
2-Mirror Gonioscope Lens, Aspheric, Anti-Reflection Coated, 62° Mirrors
2-Mirror Gonioscope Lens, Aspheric, Anti-Reflection Coated, 62° Mirrors
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Aspheric 2-mirror gonioscope lens for anterior chamber angle examination in glaucoma diagnostics and surgical planning. Two opposing mirrors inclined at 62° provide complete 360° view of the drainage angle with only 90° of lens rotation (vs 360° rotation required by single-mirror gonio lenses). Small contact surface makes it usable in children and adults with narrow palpebral fissures where 3-mirror and 4-mirror lenses don't fit. Precision-crafted glass with anti-reflection coating. Includes protective case. $99.99 direct, versus $250-$450 for Volk G-2 / Ocular OG2M / Ocular Latina M-2 branded equivalents. Free shipping on orders $99+.
Applications
- Glaucoma diagnosis: open vs closed angle differentiation (fundamental to POAG vs PACG workup)
- Angle grading: Shaffer / Van Herick correlation, Spaeth grading
- Pigment dispersion syndrome: TM pigmentation assessment
- Pseudoexfoliation syndrome: PXF material on TM and Sampaolesi's line
- Angle recession assessment: post-trauma angle evaluation
- Neovascular glaucoma: angle NV detection
- Preoperative SLT / MIGS planning: trabecular meshwork visualization prior to selective laser trabeculoplasty or MIGS (iStent, Hydrus, Kahook)
- Pediatric glaucoma: small contact footprint fits infant and small pediatric eyes where 4-mirror won't seat
- Small palpebral fissure adults: East Asian anatomy, ptosis patients, blepharospasm
Specifications
| Type | Aspheric 2-mirror indirect gonioscope lens (Goldmann-style contact lens) |
|---|---|
| Mirror Configuration | 2 opposing mirrors inclined at 62° from optical axis |
| Coverage | 360° angle view with 90° lens rotation (vs 360° rotation for 1-mirror) |
| Material | Optical glass with anti-reflection multi-layer coating (reduces reflections and improves contrast) |
| Contact | Requires coupling gel (methylcellulose 2% or hypromellose GonakⓇ-equivalent) |
| Contact Surface | Small footprint, accommodates pediatric eyes and adults with narrow fissures |
| Sterilization | Cold sterilization (10-min soak in EPA-approved high-level disinfectant) or wipe-clean with alcohol |
| Storage | Included hard protective case with foam insert |
Comparison to Volk / Ocular Gonio Lenses
| Feature | SciMed 2-Mirror | Volk G-2 (2-mirror) | Ocular OG2M | Zeiss 4-mirror |
|---|---|---|---|---|
| Mirror config | 2 × 62° | 2 × 64° | 2 × 62° | 4 × 64° (dynamic) |
| Rotation for 360° | 90° | 90° | 90° | None (dynamic) |
| Coupling gel required | Yes | Yes | Yes | No (dry contact) |
| Pediatric-usable | Yes (small) | Yes | Yes | No (large flange) |
| Price | $99.99 | $275 | $310 | $385 |
Best For
- Glaucoma specialists and comprehensive ophthalmologists (essential gonio lens)
- Optometry practices with glaucoma management scope
- Ophthalmology residents and optometry students (training lens)
- Community and rural eye clinics (cost-effective glaucoma workup)
- International eye NGOs, Aravind, LV Prasad, Fred Hollows, Sightsavers, ORBIS
- Teaching hospitals with pediatric ophthalmology (small contact fits infant eyes)
Buying for a Practice, Residency Program, or Eye NGO?
- Volume pricing on 3+ lenses (residency training and multi-provider practice)
- Net-30 invoicing for verified practices, academic and NGO accounts
- SAM.gov / VA compliant for federal ophthalmology
- Bundle discounts on gonio and BIO lens sets (20D/28D/78D/90D combinations)
- International DDP, global eye NGO and academic ophthalmology procurement
FAQ
2-mirror vs 4-mirror gonio: which do I need?
Both, ideally. 4-mirror (Zeiss / Sussman) uses dry contact and can perform indentation gonioscopy (differentiates appositional vs synechial angle closure). 2-mirror (this lens) requires coupling gel but has smaller contact area and works in pediatric eyes and narrow fissures where 4-mirror can't seat. Comprehensive practices carry both. For residency training and solo glaucoma clinic, this 2-mirror is the essential first lens.
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 standard ophthalmic viscoelastic (too thick).
How does the 90° rotation work?
Two mirrors at 62° positioned opposite each other. First view: superior and inferior angles simultaneously. Rotate lens 90°: now see nasal and temporal angles. Total 90° rotation → full 360° coverage. Single-mirror lenses require full 360° rotation to cover the angle, much slower.
Sterilization protocol?
Between patients: 10-min immersion in EPA-approved high-level disinfectant (Cidex OPA, hydrogen peroxide 3%) OR wipe with 70% alcohol. Do NOT autoclave (heat destroys AR coating and delaminates glass). Store dry in included case between uses.
User Manual (PDF)
Download the Instructions for Use (PDF)
Browse all manuals by category at scimedstore.com/pages/user-manuals. Need a digital or printed copy, or have a question? Email sales@scimedstore.com.
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