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Conversion Charts

Printable Version

Diopters to Radius Conversion Chart
39.00 8.65mm
39.25 8.60mm
39.50 8.54mm
39.75 8.49mm
40.00 8.44mm
40.25 8.39mm
40.50 8.33mm
40.75 8.28mm
41.00 8.23mm
41.25 8.18mm
41.50 8.13mm
41.75 8.08mm
42.00 8.04mm
42.25 7.99mm
42.50 7.94mm
42.75 7.89mm
43.00 7.85mm
43.25 7.80mm
43.50 7.76mm
43.75 7.71mm
44.00 7.67mm
44.25 7.63mm
44.50 7.58mm
44.75 7.54mm
45.00 7.50mm
45.25 7.46mm
45.50 7.42mm
45.75 7.38mm
46.00 7.34mm
46.25 7.30mm
46.50 7.26mm
46.75 7.22mm
47.00 7.18mm
47.25 7.14mm
47.50 7.11mm
47.75 7.07mm
48.00 7.03mm
48.25 6.99mm
48.50 6.96mm
48.75 6.92mm
49.00 6.89mm
49.25 6.85mm
49.50 6.82mm
49.75 6.78mm
50.00 6.75mm
Vertex Conversion Chart
Spectacle Power +
-3.87 4.00 4.25
-4.00 4.25 4.50
-4.25 4.50 4.75
-4.50 4.75 5.00
-4.75 5.00 5.25
-5.00 5.25 5.62
-5.12 5.50 5.87
-5.37 5.75 6.12
-5.62 6.00 6.50
-5.75 6.25 6.75
-6.00 6.50 7.00
-6.25 6.75 7.37
-6.50 7.00 7.62
-6.62 7.25 8.00
-6.87 7.50 8.25
-7.12 7.75 8.50
-7.25 8.00 8.87
-7.50 8.25 9.12
-7.75 8.50 9.50
-7.87 8.75 9.75
-8.12 9.00 10.12
-8.37 9.25 10.37
-8.50 9.50 10.75
-8.75 9.75 11.00
-8.87 10.00 11.37
-9.37 10.50 12.00
-9.75 11.00 12.75
-10.12 11.50 13.37
-10.50 12.00 14.00
-10.87 12.50 14.75
-11.25 13.00 15.50
-11.62 13.50 16.12
-12.00 14.00 16.75
-12.37 14.50 17.50
-12.75 15.00 18.25
-13.00 15.50 19.00
-13.50 16.00 19.75
-13.75 16.50 20.50
-14.12 17.00 21.50
-14.50 17.50 22.25
-14.75 18.00 23.00