GPLI logo
Search the GP lens database
Contact Us
Site Map
Site Search

GP CLINICAL EDUCATION:

Vertex and Diopters-to-Base-Curve
Conversion Charts

Diopters to Radius Conversion Chart

 

Vertex Conversion Chart

Spectacle Power

+

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

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

 

-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

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

+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

 
 

GP Lens Design Database - Online Symposium Schedule
 
Newsletter Sign-up - Order Educational Materials
 
Contact GPLI - Site Map - Home

Questions about fitting GP lenses? Send an e-mail to our panel of experts.

Copyright ©1999–2010 Contact Lens Manufacturers Association.
All rights reserved.
This page was last updated Wednesday, March 03, 2010.
 
Printing Note: If you're printing pages from this website and find that the right side is cut off, try this: With older printers, you could choose the "landscape" (horizontal) setting rather than the "portrait" (vertical) setting when printing. But most newer printers let you scale down web pages before you print. For example, if you have an HP laser printer, when you choose "Print" from the menu, you can then choose "Preferences," where under the "Effects" tab you can change the 100% setting to, say, 95%. You may also see a "ZoomSmart" feature that lets you choose "scale to fit."