|Alan Jackson||04/05/2021 10:39:48|
218 forum posts
Much as I try to be careful, I seem to have created a small frosted zone, on my prescription reading glasses, right in my line of sight. I was thinking of polishing the frosted zone away. My question is what should I use to avoid making them worse by frosting the whole lens. I realise it is probably better to just renew the glasses, but it seems a waste to throw them away.
Edited By Alan Jackson on 04/05/2021 10:40:33
2914 forum posts
I would try jewellers rouge; but preferably get new glasses you can't afford to mess about with your eyesight especially for the likes of we modellers where we need the best we can have. I have just bought 2 new pair of varifocals as my recent eye test showed a deterioration & the need for new lenses; not cheap!
|Derek Lane||04/05/2021 10:54:01|
436 forum posts
Many glasses use a plastic material similar to perspex. If you have a dremel type tool and a small buffing mop try that with a little t cut or Autosol (try it on perpex first) do not hold it on to long or press to hard you do not want too much heat build up.
There is also micro mesh which you can sand down to 12,000grit and you end up with a polished shine best used with soapy water see this pen I did with them
Edited By Derek Lane on 04/05/2021 11:01:09
|2140 forum posts|
What about the coating, if any?
|Nigel Graham 2||04/05/2021 10:57:14|
|1525 forum posts|
Autosol , as I remember, is quite harsh.
There are special polishing compounds available for these classes of plastics, but as you say, test / practice on a scrap of similar plastic first.
|1372 forum posts|
Sorry to hear about the frosted zone on your glasses. Do you know if the material used is optical glass or some kind of plastic with a hard coating? The lenses in my glasses are made from some kind of plastic material with a thin hard coating on the surface. I would first try polishing on a part of the lens that is little used to see what happens.
|Russell Eberhardt||04/05/2021 11:03:09|
2672 forum posts
If they are glass, use jeweler's rouge. If Acrylic use Perspex polish but note it's not suitable for polycarbonate.
|pgk pgk||04/05/2021 11:37:48|
|2125 forum posts|
Not saying it's the cause here but I;ve been guilty in the past for putting specs down on their lenses as th casue for such damage. It depends how old they are/when you last had an eye check as to whether still appropriate prescription.
|515 forum posts|
Brasso is finer than T-cut and would give a better finish, but all these seem a bit harsh for something which requires an optical finish. My optician warned me against using something as apparently harmless as paper tissues for wiping glass lenses because the fibres in them can scratch the surface.
On the other hand, since it appears the glasses are currently not serviceable, there's not much to lose in trying.
|222 forum posts|
Be careful not to take off too much and change the optical properties, I had a tiny scratch on the car windscreen which I had professionally polished out, it looked excellent afterwards but when a cars image filled the polished area it looked all distorted, I had to replace the screen.
|Clive Hartland||04/05/2021 14:05:03|
2671 forum posts
You could have raised or lowered the seat!
|Clive Brown 1||04/05/2021 15:29:21|
|643 forum posts|
Toothpaste will act as a fine polishing compound on plastic.
|Fowlers Fury||04/05/2021 15:40:13|
378 forum posts
You state they were prescription reading glasses. If the optician's prescription was to correct astigmatism (unlikely for reading glasses) then I would not attempt to modify the lens surface, however slightly.
As most of the cheapo shops sell 'self-select' reading glasses for less than a fiver (e.g. B&M, Poundland etc) - why bother?
Please login to post a reply.
Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!
You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.
Click THIS LINK for full contact details.
For subscription issues please see THIS LINK.