1. Range of PD adjustments:
PD of both eyes 48 ~ 80mm
Minimum graduated value 1mm
2. Dividing disc axial graduation:
Left dividing disc 1200 ~ 00 ~ 1350
Right dividing disc 450 ~ 1800 ~ 600
Axial graduation increases along the lens frame axis counter clockwise, and the graduated distance is 50.
3. Inner diameter of lens frame: F32.5mm
4. Number of lens, which can be inserted into left or right lens frame simultaneously: 4 pieces
5. Degree of lens rotating around optical axis in the lens frame: 3600
6. Nonparallelism between lens´ optical axis and lens frame's geometric axis: ≤2.50
7. Non-concentricity between lens´ optical center and lens frame geometric center:≤0.5mm
8. Displacement of lens in relation to position of lens frame geometric center:≤0.3mm
9. Range of nose rest adjustment:
Length: 0 ~ 14mm;
Angle: 0 ~ 30 degree
10.Range of left or right lens frame leg´s length adjustment: 98 ~ 135mm
11. Maximum interval between left and right lens frame legs: 200mm
Also, Trial frame BF and Trial frame C are available:
Trial frame-BF: metal construction, easy-to-use controls. PD from 54 to 70mm.
Trial frame-CF: with adjustable legs, PD from 56 to 70mm, 8colors for choice.
Trial frame AF 4880
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