Standard Gonio Lens for Static and Dynamic Gonioscopy. Lens is available with or without a flange, no flange comes as a large or small ring. Lens is G-4 Hi Mag with a field of view of 4x64 degrees, an image magnification of 1.5x, a laser spot of 0.67x and a contact diameter of 8.4mm. Manufactured by Volk, manufacturer number VG4.
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