Vertex and Diopters-to-Base-Curve Conversion Charts

Diopters to Radius Conversion Chart

Vertex Conversion Chart

Spectacle Power +
34.00
34.25
34.50
34.75
35.00
35.25
35.50
35.75
36.00
36.25
36.50
36.75
37.00
37.25
37.50
37.75
38.00
38.25
38.50
38.75
39.00
39.25
39.50
39.75
40.00
40.25
40.50
40.75
41.00
41.25
41.50
41.75
42.00
42.25
42.50
42.75
43.00
43.25
43.50
43.75
44.00
44.25
44.50
44.75
45.00
45.25
45.50
45.75
46.00
46.25
46.50
46.75
47.00
47.25
47.50
47.75
48.00
48.25
48.50
48.75
49.00
49.25
49.50
49.75
50.00
50.25
50.50
50.75
51.00
51.25
51.50
51.75
52.00
52.25
52.50
52.75
53.00
53.25
53.50
53.75
9.92mm
9.85mm
9.78mm
9.71mm
9.64mm
9.57mm
9.50mm
9.44mm
9.37mm
9.31mm
9.24mm
9.18mm
9.12mm
9.06mm
9.00mm
8.94mm
8.88mm
8.82mm
8.76mm
8.70mm
8.65mm
8.60mm
8.54mm
8.49mm
8.44mm
8.39mm
8.33mm
8.28mm
8.23mm
8.18mm
8.13mm
8.08mm
8.04mm
7.99mm
7.94mm
7.89mm
7.85mm
7.80mm
7.76mm
7.71mm
7.67mm
7.63mm
7.58mm
7.54mm
7.50mm
7.46mm
7.42mm
7.38mm
7.34mm
7.30mm
7.26mm
7.22mm
7.18mm
7.14mm
7.11mm
7.07mm
7.03mm
6.99mm
6.96mm
6.92mm
6.89mm
6.85mm
6.82mm
6.78mm
6.75mm
6.72mm
6.68mm
6.65mm
6.62mm
6.58mm
6.55mm
6.52mm
6.49mm
6.46mm
6.43mm
6.40mm
6.37mm
6.34mm
6.31mm
6.28mm
-3.87
-4.00
-4.25
-4.50
-4.75
-5.00
-5.12
-5.37
-5.62
-5.75
-6.00
-6.25
-6.50
-6.62
-6.87
-7.12
-7.25
-7.50
-7.75
-7.87
-8.12
-8.37
-8.50
-8.75
-8.87
-9.37
-9.75
-10.12
-10.50
-10.87
-11.25
-11.62
-12.00
-12.37
-12.75
-13.00
-13.50
-13.75
-14.12
-14.50
-14.75
-15.12
-15.50
4.00
4.25
4.50
4.75
5.00
5.25
5.50
5.75
6.00
6.25
6.50
6.75
7.00
7.25
7.50
7.75
8.00
8.25
8.50
8.75
9.00
9.25
9.50
9.75
10.00
10.50
11.00
11.50
12.00
12.50
13.00
13.50
14.00
14.50
15.00
15.50
16.00
16.50
17.00
17.50
18.00
18.50
19.00
+4.25
+4.50
+4.75
+5.00
+5.25
+5.62
+5.87
+6.12
+6.50
+6.75
+7.00
+7.37
+7.62
+8.00
+8.25
+8.50
+8.87
+9.12
+9.50
+9.75
+10.12
+10.37
+10.75
+11.00
+11.37
+12.00
+12.75
+13.37
+14.00
+14.75
+15.50
+16.12
+16.75
+17.50
+18.25
+19.00
+19.75
+20.50
+21.50
+22.25
+23.00
+23.75
+24.75