Monday, August 26, 2013

Peeling Lenses, Not Trees

A previous post described the bark that’s shedding on the crepe<SAMSUNG DIGITAL CAMERA> myrtles in the F&P backyard.
That’s NOT the only peeling that’s been  going on — here’s some of a different sort — my glasses, which are just over 2 years old.
What caused this ?
It’s the coating on the high-index lenses. High-index is a term used to describe plastic lens materials that are thinner and lighter than regular plastic lenses. For a given prescription power and lens design, the factor that determines lens thickness is the index of refraction index of the lens material. Generally, the stronger a prescription (like mine), the thicker the lens material. High-index lenses are nearly 50% thinner than “regular” plastic lenses and can reduce the “eye-shrinking” effect of high prescriptions. The lenses usually have advanced anti-reflective (AR) lens treatment, which are what’s peeling. AND, the higher the index, the higher the lens cost, up to $100 more than plastic lenses.
When the peeling started (and progressively worsened), I returned to the local optometrist where they were bought. The Bad News was that it was past the 1-year warranty, who knew? There was no work-around offered, like removing the AR coating. AND during my on-line search to learn if others had this same problem, it seems that a LOT of folks with high-index lenses and the AR coating, sooner or later had a similar problem, many after expiration of a warranty . Also read where folks purchased products for a do-it-yourself removal project — NOT for me.

Since it was time for my eye exam, makes sense if you will order new glasses, I opted to return to the “regular” plastic lenses sans AR coating. Sure they are thicker (heavier too), but a new frame obscured the larger lenses a bit and these will NOT peel. Glass is also an option, but heavier than plastic and more susceptible to breakage.
SAM_2145<SAMSUNG DIGITAL CAMERA>old-new glasses
After a couple of weeks, I’m used to the new style. It reminds me of Harry Potter; YES, I did enjoy the books and movies too.


Sandra said...

my friend Barbara is going through the same thing right now, she just made an appointment to get new glasses, i will send her this so she will know what to ask for.

NCmountainwoman said...

Bummer! They should come with a disclaimer. Love your new glasses though.

Debbie said...

you look good with glasses, like you belong together/go together!!

Anvilcloud said...

Does this have anything to do with leaving them in a hot car?

Montanagirl said...

I have plastic lenses, which are pretty scratched up, even with scratch resistant coating and anti-reflective coating. I'm only into these lenses since the first part of January. I probably won't get any coatings next time, as they turned my lenses a weird off-yellow color for me to look through. (Oh, and they weren't cheap either)

Tammy@Simple Southern Happiness said...

acatone or acitone the stuff that is in nail polish remover has been known to remove the AF coating. Since the lenses are no good as they are, you can try it. I opted out of the AF coating due to this problem. LOVE the new frames!!!!

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