this post was submitted on 03 Oct 2024
71 points (100.0% liked)

Ask Lemmy

26707 readers
1410 users here now

A Fediverse community for open-ended, thought provoking questions

Please don't post about US Politics.


Rules: (interactive)


1) Be nice and; have funDoxxing, trolling, sealioning, racism, and toxicity are not welcomed in AskLemmy. Remember what your mother said: if you can't say something nice, don't say anything at all. In addition, the site-wide Lemmy.world terms of service also apply here. Please familiarize yourself with them


2) All posts must end with a '?'This is sort of like Jeopardy. Please phrase all post titles in the form of a proper question ending with ?


3) No spamPlease do not flood the community with nonsense. Actual suspected spammers will be banned on site. No astroturfing.


4) NSFW is okay, within reasonJust remember to tag posts with either a content warning or a [NSFW] tag. Overtly sexual posts are not allowed, please direct them to either [email protected] or [email protected]. NSFW comments should be restricted to posts tagged [NSFW].


5) This is not a support community.
It is not a place for 'how do I?', type questions. If you have any questions regarding the site itself or would like to report a community, please direct them to Lemmy.world Support or email [email protected]. For other questions check our partnered communities list, or use the search function.


Reminder: The terms of service apply here too.

Partnered Communities:

Tech Support

No Stupid Questions

You Should Know

Reddit

Jokes

Ask Ouija


Logo design credit goes to: tubbadu


founded 1 year ago
MODERATORS
 

Mine have built a decent number of very small scratches and they're getting annoying so I'd like to get rid if at all possible.

I've seen various things suggested including:

  • lens scratch repair kit (reviews don't look great on amazon)
  • baking soda paste
  • non-abrasive toothpaste
  • furniture polish (temporarily fills in the scratch from what I can tell)

I'm reluctant to try any of them without some first hand accounts. No lens coating on these so no worries there.

Thank you in advance!

edit: I just want to say thanks very much to everyone. I ended up getting my prescription emailed to me and buying a new pair for €17 (about $19 USD) delivered on a site that one helpful poster linked. Looks like they will take about 3 weeks to get here so I'll put up with the scratchy ones until they get here.

When they do arrive I will take some pictures and test the various methods I found online then post up what works and what wrecks the lenses.

you are viewing a single comment's thread
view the rest of the comments
[–] [email protected] 1 points 1 month ago

Not all plastics are made equal. Two different 1.5 or 1.6 index plastics from different manufacturers will have different scratch resistance as well as different levels of aberration depending on how good their materials science is.

All plastic is softer than glass, yes, which is why any plastic lens you get has a hardcoat to reduce scratching and if it is from a quality lab, a scratch/antireflective coat as well.

If you've never had plastic lenses last very long, where you are sourcing them from is using inferior quality plastics with whichever lab partner they use. That or you a) leave them in a hot car and the heat damages them b) constantly leave them lens-face down on the table

But I have had people with very stable prescriptions keep plastic lenses in good condition for 15-20 years in extreme cases.

Laminated glass treatments may be used, but because they cause problems with the cutting machinery it is far more common in optical glass lenses to see chemical or heat treating. If these are done well, they can be quite resistant to shattering. This, however, really comes down to the individual skill of the person treating your lens and I've seen enough damaged eyes to be wary of them.

Another reason many labs have moved away from mineral lenses entirely is that they shatter when being cut to shape for your glasses, posing greater risk to the one doing the edging and significantly greater cost to the lab. Depending on the complexity of prescription they may shatter up to 3 or 4 times before one cuts properly into shape.

To add onto this, if you are using progressive glasses, you are certainly getting an inferior product as no lab I'm familiar with puts their new progressive designs into mineral. The majority only have designs from 15-20 years ago with terrible intermediate segments.