Archived posting to the Leica Users Group, 1999/08/14
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Ken: Ok, but look at the face size of most men's watches. that would work for an eyeglass lens yes. So if you got 3-5 yrs wear out of one pair of glasses? I guess though with the change of prescription needs, that the glasses might outlast their need. But I think the cost would not be that much more than buying 3-5 new pairs in the process. Yes-No? Cheers Wilber Ken Iisaka wrote: > > Can someone tell me why they can't make eyeglass lens out of sapphire. I > have a > > Cyma watch with a sapphire crystal and in two years of hard wear NO > scratches. > > But I too will kill my eyeglasses in 3-6 mnts. > > Cheers Wilber > > Cost. A crystal big enough to be cut and ground into eyeglasses are > horrendously expensive, not to mention the cost of grinding and polishing > with diamond!!!