> On Oct 12, 8:28 pm, "Rob O." <[email protected]> wrote: > I'm about to venture in to this uncharted (for me) territory of > purchasing eyeglasses online. I'm tempted to try a pair of rimless - > which would also be a first for me - but a little nervous about the > edge thickness of the lens. > > In my current glasses which came from a brick & mortar shop, the left > lens (-2.50 spherical, -1.50 cylindrical, & 160 axis) is about 53mm > wide & 27mm tall. At its outer-most edge, the lens is 6mm thick. I > have no idea what the lens index is specifically, although I recall at > the time of purchase, that I had to pay a bit extra and wait a couple > of days for "High Index" lens. > > I'm comfortable with a comparable lens width (+/- a couple of mms) but > I worry that in a rimless style, that's 6mm outer edge would look > kinda bad. So, would stepping up to a more expensive 1.591 or 1.60 > High Index lens keep that outer edge thickness down a bit? And aside > from the cost, is there a downside to using a higher index lens - do > you forgo some material strength or scratch-resistance when you get > into those higher index options? I read something that implied that > higher index lens might be less optically-correct than standard index > lens - any truth to that?
Chuck Knight, a frequent poster here, uses this website to help determine lens edge thickness: http://www.opticampus.com/tools/thickness.php My prescription is -1.50 spherical and I just measured the edge thickness of my Zenni polycarbonate rimless lenses with a micrometer and they are 2.5mm thick. I can't answer your questions regarding high index lenses, but I'm sure someone will. > And finally & more generally, I'm a new Dad and my glasses are taking > a bit more incidental abuse from my rough & tumble toddler. With that > in mind, am I just crazy for even considering rimless? Would a hinge- > less design be better or worse for enduring minor bumps? Rimless glasses are a bit more fragile than other style of frames, but with care they can last a long time. I would think a full 180 degree spring frame would be better than a hingeless design. Are these progressives? (Doesn't sound like it). If they are single vision lenses you could give Zenni a try and probably get a nice rimless design for less than $30. If they break you're not out a bundle of money. --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
