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Gonioscopy ophthalmic lens G-4 Mirror Gonio
with wide field-of-viewhigh-resolution

Gonioscopy ophthalmic lens - G-4 Mirror Gonio - Volk - with wide field-of-view / high-resolution
Gonioscopy ophthalmic lens - G-4 Mirror Gonio - Volk - with wide field-of-view / high-resolution
Gonioscopy ophthalmic lens - G-4 Mirror Gonio - Volk - with wide field-of-view / high-resolution - image - 2
Gonioscopy ophthalmic lens - G-4 Mirror Gonio - Volk - with wide field-of-view / high-resolution - image - 3
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Characteristics

Applications
for gonioscopy
Technology
high-resolution, with wide field-of-view

Description

Product Description
The G-4 Mirror gonio lens provides a comprehensive view of the trabecular meshwork with minimal lens rotation thanks to its four‑mirror, all‑glass Sussman‑style design. It delivers high‑resolution optics for detailed examination of anterior chamber angle structures. Variants include large (28.5 mm) or small ring (25.5 mm), flanged or no‑flange versions, and a 2‑position Posner‑style handle for right/left handed use. The no‑flange/no‑fluid option is suitable for dynamic and indentation gonioscopy, while the flanged version enhances stability during procedures such as trabeculoplasty.

Features
  • Four 64° mirror angles for broad angle visualization
  • 1.0x image magnification
  • 1.0x laser spot size
  • Contact diameter: 15 mm (flange) / 8.4 mm (no flange)
  • No‑Flange / No‑Fluid version ideal for dynamic and indentation/compression gonioscopy
  • Designed for quick exams with maximum patient comfort
  • Flanged version available for improved stability during procedures (e.g., trabeculoplasty)

Part Numbers
  • VG4 — Flange, Large Ring
  • VG4LNF — No Flange, Large Ring
  • VG4SNF — No Flange, Small Ring
  • VG4HAN2 — No Flange, 2-in-1 Handle (Posner style)

Resources
  • Cleaning and Care Guide (PDF available from the product documentation)

Specifications
  • 4 × 64° mirror angles
  • Image magnification: 1.0x
  • Laser spot size: 1.0x
  • Contact diameter: 15 mm (flange) / 8.4 mm (no flange)
  • Available variants: Flange / No Flange; Sizes: Large, Small, 2‑in‑1 Handle
  • Designed for rapid, comfortable gonioscopic examinations
  • Not recommended for SLT — Volk Rapid SLT or a dedicated SLT lens is recommended for selective laser trabeculoplasty procedures

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Diagnostic Lenses

*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.