Volk® Digital Clear Field indirect BIO lens, blue ring, 55°/72° FOV, 2.79x image mag., 0.36x laser spot, 37.0mm working distance, ideal for highest resolution pan retinal examination | Ambler Surgical
Volk 20D Classic Indirect BIO Lens (Black) - Excellent condition - No case | eBay
Used VOLK 20D Double Aspheric Classic Indirect Bio Lens Ophthalmology General For Sale - DOTmed Listing #4252494:
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20D Indirect BIO Lens Volk - Modern Surgical
Volk 20D Classic Indirect BIO Lens (Black) - Excellent condition - No case | eBay