Anterior Chamber and Central and Peripheral Fundus Diagnosis and Treatment. Available with or without flange. Advanced no fluid flange eliminates need for viscous coupling fluid. Lens is 3 Mirror with a field of view of 60/66/76 degrees, an image magnification of 1.06x, a laser spot of 0.94x and a contact diameter of 15mm. Uncoated. Manufactured by Volk.