ultrasonic cleaners are sweet, not that i have one.
if you have an ARC
watch the temp shifts, checking the grill? take off your glasses first, etc. the temp change causes the coating to peel.
do not use fabric softener on anything that will come in contact with your glasses, even carrying your cleaning cloth in the pocket of your pants, that were washed with FS, will get the crap on your lenses. it gets into the uneven surface(what makes the coating work in the first place) and is very hard to remove.
if you can get the slick coating do, it's worth the extra cash. but know going in it only last 12-18 months, but then you have normal AR coating, which seems to last 12-18 months.
AR coat is mostly useful for driving at night, and reading/watching tv in a dark room with a table level lamp on, if you don't you might not like it.
if you can get a pair of glasses without it, i try to remember to wear mine when cooking. or running anything like a dremel, the powder off that thing ruins AR coating fast.
AR seems to stick better to
CR-39 better than poly, and glass better then CR-39.
remember glass lenses are heavy, and hard to get,
well in the US.
CR-39 lasts longer then poly, and with a hard coat is harder to scratch.
coasts more to make, but thanks to people pushing poly, it's cheaper to buy. they have to charger more for poly so people think it's better.
poly is better, only if your using your glasses as safety glasses.
and yes, more is better. i like having at least 3 pairs.
AR coated
not AR coated
and sunglasses, photochromic is ok, but polarized and permanent tint is much better. been looking at some driving tint lenses that start with a nice yellow shooting tint and get to a dark brown.
(
random link to the product information)
oh and when your buying MF cloths, more is better. BJs sells 3 and 5 packs. you can't have to many, but you can put to much money into them. if you buy good ARC lenses they should come with a branded cleaning cloth. kinda like the one a good scope comes with, small and thin. but they work.
oh, and one trick the guy selling you glasses will hate. if your nearsighted and need bifocals. you can skip them, and buy frames short enough to look under to read.
and
this site has a lot of information, but they hate having customers on there site.
edit: don't know how i dropped that link, but it's there now.
and really don't bother registering they'll just ban you.
can't even find the link in my bookmarks now, it's like i cut it out of them,(instead of copying) and forgot to post it.