GLASS prescription lenses

[MikeFarm]

Hi all

You can get as an option a hard anti-scratch coating applied to your plastic glasses. That coating (usually titanium nitride) is harder than glass.

Mike

 

[3930dave]

More choices ! Great stuff !

It is good to see that there are still a few specialists that deal with glass.

I've been told that a big factor with plastic lenses is the coating - some of the top coatings test OK re. scratches, others, not so much.

Rgds, D.

 

[eray1066]

I was very shocked to find out that a pair of glass bifocals were not safety glass. I dropped them and one lens spalled a few sharp shards on the floor. I had been relying on them to protect my eyes. Polycarbonate from then on. I try to buy shirts that have special glasses pockets to keep them in good shape. .

 

[3930dave]

Good point about the safety glass. Some jurisdictions mandate safety glass, but given Internet ordering that is not controlled the way it used to be.

Always a good idea to confirm that you are getting safety glass when ordering.

Rgds, D.

 

[CliffordK]

I get glass lenses, although it is time for an update, and I'm still hoping not to need bifocals yet. The lenses are pretty thin, for astigmatism.

A few years ago I started getting Safety Glasses. They will only put them in a limited number of frames... so if an optomitrist has 500 styles of frames, they may have a half a dozen "safety glass" frames to choose from.

My biggest problem is not scratches, but I have a bad habit of getting grinder burns in the lenses. I was told that plastic may in fact be more resistant to the grinder burns than the glass.

I wish there was a removable protective layer that one could put on the lenses, somewhat like the plastic covers one can buy for cell phone screens.

 

[3930dave]

Seems counter-intuitive that plastic would be better than glass in that respect, but Piloon was making the same comment - interesting, and an indication of how far optical plastic has come.

I don't do enough metal work for it to be a problem for me - with today's small (area) lenses, I just use a pair of non-prescrip safety glasses over top of my regular ones. For the little bit of time I have them on I can put up with it, but it's not something I would want 40+ hours/week.

The film technology likely exists for what you desire, probably the tough part is designing a temporary adhesive that is optically clear - though I'm sure 3M could pull that off.

The tear-offs that MX riders use come in a cassette/cartridge system that mounts/handles the protective layer - pretty clunky for a regular pair of glasses though.... Upside is it would get you some interesting looks, when worn in public ! :laughing:

Rgds, D.

 

[2LaneCruzer]

I was very shocked to find out that a pair of glass bifocals were not safety glass. I dropped them and one lens spalled a few sharp shards on the floor. I had been relying on them to protect my eyes. Polycarbonate from then on. I try to buy shirts that have special glasses pockets to keep them in good shape. .

I ordered on pair of the polycarbonate to wear when I am woodworking.

 

[JakeBrake]

I've ordered safety glasses from online providers. Even online there is a very limited selection of safety frames. The glasses have arrived at my home with codes on the lenses, side guards, and all the documentation that you would expect with safety glasses that some working people might have to show to safety inspectors.

I like the safety glasses that I've ordered online and I would wear them all the time, but the last time I checked, Transitions lenses are not available in safety glasses and I also like Transitions lenses.

 

[aczlan]

Hi all
You can get as an option a hard anti-scratch coating applied to your plastic glasses. That coating (usually titanium nitride) is harder than glass.
Mike

It must depend on the coating, I have coated plastic lenses and the coating starts coming off in a year or so on all of them.

Aaron Z

 

[CliffordK]

I like the safety glasses that I've ordered online and I would wear them all the time, but the last time I checked, Transitions lenses are not available in safety glasses and I also like Transitions lenses.

My glasses are a few years old. Time for an update, so I don't know if anything has changed. However, the last two pairs I got were glass safety lenses with photo-grey (transition) lenses.

They were purchased from a company called Industrial Vision in St. Louis. For safety glass frames, they had a very large selection, much greater than any typical optometrist. They work with both individual and corporate clients. However, I don't know if they will ship the glasses as I don't see an online catalog.