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Volk® 20D BIO lens, blue ring, 46°/60° FOV, 3.13x image mag., 0.32x laser spot, 50.0mm working distance, ideal for imaging of the macular and optic disc | Ambler Surgical
Affordable 20D lenses from oDocs - fundus examination | A range of affordable ophthalmic lenses from oDocs Eye Care is now available. These were made for DIY, handheld smartphone fundoscope, and building
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Optical Instrument Lens 20d 78d 90d Slit Lamp Examination Fundus Aspherical Retinal Lens Ophthalmological Diagnosis - Instrument Parts & Accessories - AliExpress
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