Brand new optical trial lens frame, provides the ability to refract even the most difficult prescriptions and offers all the adjustments to ensure a proper and comfortable fit onto your patient Range of PD adjustments:PD of both eyes: 48 ~ 80mm;left or right PD: 24 ~ 40mm;minimum graduated value: 1mm Dividing disc axial graduation: Left dividing disc:120°~0°~135° Right dividing disc:45°~180°~60° Axial graduation increases along the lens frame axis counter clockwise,and the graduated distance is 5°. Inner diameter of lens frame:32.5mm. Number of lens which can be inserted into left or right lensframe simultaneously:4 pieces Degree of lens rotating around optical axis in the lens frame:360° Nonparallelism between lens'optical axis and lens frame's 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 rest adjustment: Length:0 ~ 14mm; angle:0° ~ 30° Range of left or right lens frame leg's length adjustment:98 ~ 135mm. Maximum interval between left and right lens frame legs:200mm Material: lightweight metal or plastic Color:Black +　Silver Size:15.50*6.00*3.50cm
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