Based on your information without PD or the lens width of your frame, I selected the average PD of 63mm and lens width of 48mm to calculate edge thickness of your lens based on 4 types of lens:
1.5 standard CR39 lens - OD:2.4mm OS:2.4mm 1.56 mid index CR39 lens - OD:1.8mm OS:1.8 Polycarbonate lens - OD:1.8mm OS:1.8mm 1.6 high index lens - OD:1.8mm OS:1.8mm As you can see from all cases, the lens thickness for all 4 types of material is exactly the same for both your right(OD) and left lens(OS) and that spending more money for polycarbonate or high index 1.6 lens in your case is a waste of money ! On Oct 22, 7:16 am, Lorena <[email protected]> wrote: > Hi, > > I recently went to the optometrist for my annual exam and got my > prescription. When I went to pick out glasses though my jaw hit the > floor when i saw the prices. So I decided I was going to buy online. > > I have a relatively stronger prescription need in my left eye as > compared to my right and my local optician said I would need to > purchase polycarbonate lenses to avoid extremely thick lenses and so > that the lenses would be made as close in width to each other as > possible. > > Is this true? > > Also considering my prescription: my right eye is -.50/-.50/012 and my > left eye is -1.25/ > -1.0/172, would there be a substantial thickness difference if i went > with the regular plastic lenses as opposed to the polycarbonate or > even a high index glass lens. > > Thanks in Advance. --~--~---------~--~----~------------~-------~--~----~ Check us out at the oft-updated http://glassyeyes.blogspot.com! You received this message because you are subscribed to the Google Groups "GlassyEyes" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/glassyeyes?hl=en -~----------~----~----~----~------~----~------~--~---
