Refraction Index
 

I was looking at my glasses the other day, and I wondered, "How does my prescription relate to the refraction index in Lightwave???" Any ideas? In my specific case, my glasses prescription (what is this called/what is it measured in????) is
-3.50, but how do I find the refraction number that this relates to in Lightwave? Is there a real-world correlation?

Generally, the refraction index of the lens in your glasses will be that of normal glass (can't think what this is off the top of my head, but there's a handy table in the back of Dan Ablans Simply Lightwave Books). The refraction index should be constant. The prescription value is a measure of the strength of the lens. This link should tell you all you need to know:

http://www.hon.ch/Library/Theme/Visi...tion2.html#2.1

That was just what I was looking for, thanks Mark. :)