Sounds like optiboard has turned into a Monty Python sketch.
What is the minimum center/edge thickness for full rim frames? If it's 2mm, then 1.6 lenses in plano or low plus powers would probably not be any lighter. I have a pair with round 1.6 lenses (+0.25) which should weigh no more than 4 grams each according to the Spectacle Optics program, but they actually weigh 5 grams each. Seems pretty pointless then. If only I could order Trivex...
Last edited by Airegin; 06-18-2020 at 07:59 PM.
I had created a sample page to show the differences in weight, thickness and chromatic aberrations a while back.
I titled it The War between Optics and Cosmetics, after Barry wrote his article in 20/20
It breaks everything down in charts.
You can view it here.
https://www.mccardle.me/analysis/
Interesting thread.
I have thought that it's time the optical industry move on and dropped Cr39 and use 1.6 as the standard lens material. Uncoated it is not too reflective if no MAR is issued.
It would, however, need top down cost revisions from manufacturers through to labs to get the cost similar to CR39.
https://www.google.com/search?q=weig...hrome&ie=UTF-8
Liar! Heretic! Psycho-killer of truth!
Yes, you do need to go on. You seem to be implying that I said 1.60 was no good and we shouldn't use it. I obviously didn't. You compared 1.60 to CR39. I asked why would we get rid of a great, inexpensive material that is suitable for many patients?
Not even close to a comparison that makes sense.
There are currently 1 users browsing this thread. (0 members and 1 guests)
Bookmarks