Professional Adjustable Optical Optic Eye Optometry Test Trial Lenses Frame,Optometry Optician Trial Lens

Features & Specifications: * Range of PD adjustments: PD of both eyes: 48~80mm; Left or right PD: 24?40mm; Minimum Calibration Value: 1mm. * Axial calibration on each disc: Left disc: 120°~0°~135°, Right disc: 45°~180°~60°, Axial calibration increases counter clockwise along the lens frame axis, and the calibration distance is 5. * Inner diameter of lens frame: ?32.5mm. * The Number of lens which can be inserted into left or right lens frame simultaneously: 4 pieces. * Degree of lens rotating around optical axis in the lens frame: 360°. * Non-parallelism degree between lens optical axis and lens frames geometric axis: ?2.5°. * Non-concentricity between lens optical center and lens frame geometric center: ?0.5mm. * Displacement of lens in relation to position of lens frame geometric center: ?0.3mm. * Range of nose pad adjustment: Length: 0~14mm; Angle: 0°~30°. * Range of left or right lens frame leg's length adjustment: 98mm?135mm. * Maximum interval between left and right lens frame legs: 200mm. Package included: 1x Trial Lens Frame