Date: 3/11/2021 11:53:01
From: buffy
ID: 1811911
Subject: Spectacle lens coatings

Right then…hands up if you have ever worried about bacterial contamination of your spectacle lenses? No? I thought so…

Here is the latest add on. (Can you tell I think it’s a money making exercise and nothing more?)

https://www.hoyavision.com/vision-products/anti-reflective-coatings/hi-vision-anti-bacterial/

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Date: 3/11/2021 12:04:36
From: Michael V
ID: 1811920
Subject: re: Spectacle lens coatings

buffy said:


Right then…hands up if you have ever worried about bacterial contamination of your spectacle lenses? No? I thought so…

Here is the latest add on. (Can you tell I think it’s a money making exercise and nothing more?)

https://www.hoyavision.com/vision-products/anti-reflective-coatings/hi-vision-anti-bacterial/

I have never ever worried about that. I’ve probably never thought about it before, honestly. I have been wearing spectacles day-in, day-out for nearly fifty years…

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Date: 3/11/2021 12:08:17
From: captain_spalding
ID: 1811924
Subject: re: Spectacle lens coatings

Michael V said:


buffy said:

Right then…hands up if you have ever worried about bacterial contamination of your spectacle lenses? No? I thought so…

Here is the latest add on. (Can you tell I think it’s a money making exercise and nothing more?)

https://www.hoyavision.com/vision-products/anti-reflective-coatings/hi-vision-anti-bacterial/

I have never ever worried about that. I’ve probably never thought about it before, honestly. I have been wearing spectacles day-in, day-out for nearly fifty years…

I find that the alcohol hand sanitiser makes an excellent specs cleaner. And it kills germs.

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Date: 3/11/2021 12:13:04
From: Michael V
ID: 1811932
Subject: re: Spectacle lens coatings

captain_spalding said:


Michael V said:

buffy said:

Right then…hands up if you have ever worried about bacterial contamination of your spectacle lenses? No? I thought so…

Here is the latest add on. (Can you tell I think it’s a money making exercise and nothing more?)

https://www.hoyavision.com/vision-products/anti-reflective-coatings/hi-vision-anti-bacterial/

I have never ever worried about that. I’ve probably never thought about it before, honestly. I have been wearing spectacles day-in, day-out for nearly fifty years…

I find that the alcohol hand sanitiser makes an excellent specs cleaner. And it kills germs.

Ha!

I just use a clean hankie. I make sure I have one in each pocket every morning.

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Date: 3/11/2021 19:30:10
From: mollwollfumble
ID: 1812086
Subject: re: Spectacle lens coatings

Any-reflective coatings can be an absolute pain. I avoid them when the optometrist lets me. Often the optometrist doesn’t let me, a lot of high reflactive index progressive lenses don’t come without an anti-reflective coating.

I had one case where I had brittle fracture of the anti-reflective coating, it split perpendicular to a scatch and opened up nearly a mm gap. Opening up a bight zig-zag line across my field of view.

In plenty of cases, the slightest oil and they go all rainbow. And they’re a pain to clean.

In every case, anti-reflective coatings are tuned to a specific wavelength (because of their specific thickness) and that affects the colour spectrum of light reaching the eyes, making the spectrum plain wrong. Sometimes I’ll walk around ouitside without my glasses just for the extreme pleasure of seeing the world in true colour.

The only advantage of anti-reflective lenses that I know of is that they don’t reflect flash back to the camera when taking passport photos.

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Date: 3/11/2021 19:30:56
From: mollwollfumble
ID: 1812087
Subject: re: Spectacle lens coatings

Anti-reflective coatings can be an absolute pain. I avoid them when the optometrist lets me. Often the optometrist doesn’t let me, a lot of high reflactive index progressive lenses don’t come without an anti-reflective coating.

I had one case where I had brittle fracture of the anti-reflective coating, it split perpendicular to a scatch and opened up nearly a mm gap. Opening up a bight zig-zag line across my field of view.

In plenty of cases, the slightest oil and they go all rainbow. And they’re a pain to clean.

In every case, anti-reflective coatings are tuned to a specific wavelength (because of their specific thickness) and that affects the colour spectrum of light reaching the eyes, making the spectrum plain wrong. Sometimes I’ll walk around ouitside without my glasses just for the extreme pleasure of seeing the world in true colour.

The only advantage of anti-reflective lenses that I know of is that they don’t reflect flash back to the camera when taking passport photos.

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