>From lens edge thickness there is very little difference between Zenni's 1.57 index as compared to a 1.61 high index lens. You would have to have a Rx in excess of -8.00 to see a half a millimeter difference.
The only thing with Zenni is that your frame height must be 32mm or higher to be able to produce progressives while other known brand name lens like Rodenstock can produce progressives as low in frame height as 18mm with a 1.54 mid index lens. So, whether they says high index or not does not really give you the whole story. If you provide your Rx here, I can calculate the lens edge thickness based on the frame dimensions(width x height x nose bridge length) you choose to see if it worthwhile to pay the extra for a higher index lens. On Nov 17, 12:16 am, sharon888 <[email protected]> wrote: > I noticed that Zenni doesn't offer high index lenses for progressives, > whereas some of the other companies do. I've always tended to go for > as thin as I can get when it comes to lenses and worry that the Zenni > lenses may be too thick.I checked out Coastal Contacts and they have > four different progressive lenses to choose from. Has anyone had > experience with any of these. My bad eye is -7.5. The better one is > -4.5. I'm deciding between Super Thin 1.67 and Ultra Thin 1.74. Does > anyone have any experience to offer. Thanks in advance for your input. > > +$79.00 > 1.58 Standard High Quality Progressive Lens > Recommended for Prescriptions from 0.00 to -4.00 > > +$99.00 > Thin 1.61 Index Free Form Lens > Recommended for Prescriptions from 0.00 to -6.00 > > +$149.00 > Super Thin 1.67 High Index Free Form Lens – TRY ME! > Recommended for Prescriptions from -2.00 to -8.00 > > +$199.00 > Ultra Thin 1.74 High Index Free Form Lens > Recommended for Prescriptions over -6.00 -- 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
