I'm sorry,I just found answers to some of my questions. In one of the treads a participant gave a link to a site with a calculator of thickness. This one : http://opticampus.com/tools/thickness.php
There is a lot of lenses... In this same site I found this too: http://opticampus.com/tools/materials.php Refraction Abbe Specific UVB/ UVA index value Gravity Protection CR-39® Hard Resin 1.499 58 1.32 100% / 90% Polycarbonate 1.586 30 1.20 100% / 100% MR-6 1.6 Plastic 1.595 36 1.34 100% / 100% MR-8 1.6 Plastic 1.592 41 1.30 100% / 100% MR-7 1.67 Plastic 1.658 32 1.35 100% / 100% MR-10 1.67 Plastic 1.661 32 1.37 100% / 100% MR-174 1.74 Plastic 1.732 33 1.47 100% / 100% What I understood (between the two pages) is that for my right eye the thickness go between 6.7 with hard resin(wich is apparently cr-39 as per the second page)and 4.9 with 1.67 mr-7.Mid index 1.56 would be 5.6 For my left eye 6.2 for hard resin ,5.2 with mid index(1.56) and 4.6 with 1.67 mr-7. Sooo...If I'm not completely hopeless it would means that mid index would be better,but cr-39 not that bad,1.67 the safe bet.I'm I right?I checked my old lenses,they are around 5 mm thick at the temple..I'm fine with that.With either,in fact. Ira,I know from your blog that your vision is about the same as mine.And I know you purchased a few times CR-39 lenses and you were happy.Would you still do the same today?Someone else have the same vision as me and tested a few lenses? Question number one answered :) Question number 2 too,since the chart give the UV protection. Butt I add another one^^ Is tinting possible for each kind of lenses?Looks like it,but I would love to be sure. --~--~---------~--~----~------------~-------~--~----~ Check us out at the oft-updated http://www.glassyeyes.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 -~----------~----~----~----~------~----~------~--~---
