X-Pro Minuo TVX Base Curve Selection Guide

Blank Lens

Base

True Base

Radius

Centre

Edge

50 mm

Blank Size: 70 mm  Basecurve 3.00, 4.00, 5.00, 7.00  

Diameters

Curve

Index 1.53

(mm)

Thickness

Thickness

SAG

Add Powers: 1.00 to 3.50 in 0.25 Dioptre Steps

70

3.00

2.93

180.890

10.0

13.0

1.74

Material Properties: Refractive Index 1.53  Abbe Value 44 Density 1.11

70

4.00

4.25

124.720

8.0

9.0

2.53

Lens Engraving: VX

70

5.00

5.63

94.140

8.0

8.0

3.38

Engraving Code

10

12

15

17

20

22

25

27

30

32

35

70

7.00

7.2

73.620

9.0

7.0

4.38

Addition Power

1.00

1.25

1.50

1.75

2.00

2.25

2.50

2.75

3.00

3.25

3.50