Adjustment of Pupillary Distance
| Two eyes’ pupillary distance is 54 mm～70 mm,and adjustment of each grade requires change of 2 mm |
Axis graduation of calibrated dial | Left and right calibrated dials are identical, where axis graduation line runs clockwise along axis graduation line of lens frame, 165°, ～0°, ～180° and ～25°, with distance of graduation line being 5° |
Inner pore diameter of lens frame | ф 34 mm |
Number of lens that can be inserted into left and right lens frames at the same time | 4 pieces |
Degree that lens rotates around optic axle inside lens frame | 360° |
Non-parallelism between lens optic axis line and geometric centre-line of lens frame | ≤2.5° |
Misalignment between lens optic center and geometric center of lens frame | ≤0.5 mm
|
Displacement of lens to position of geometric center of lens frame | ≤0.3 mm |
Adjustment range of nose rest | Up and down direction 4 mm |
Width between 2 nose rests 7.5 mm～11 mm |
Rotation angle of left or right nose rest 20° |
Length adjustment range of left or right lens frame leg | 90 mm～120 mm |
Maximum distance between left and right lens frame legs | 200 mm |
Weight | 48g |