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the pupil diameter and refractive error can be set exactly and are therefore reproducible - the front lens compartment holder accepts up to two trial lenses - the cylinder can be read from the graduated scale
• Scale: 0° – 180° for cylinder determination
• Diameter of pupil variable: 2, 3, 4, 5, 6, 8 mm.
• Optics: Optical glass, achromatic lens, focal length F = 32 mm.
• Trainer body made of metal: Extremely stable and durable
• Angle of examination variable