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Billy Rowe
Lv 4
Billy Rowe asked in HealthOptical · 8 years ago

Are BC and DIA supposed to change? Complete discomfort.?

I needed contact lenses because the one ripped and I had one eye in and could not see when driving. So my mother called the doctor and they said I needed to get a new eye exam in-order to order more contacts.

I switched the brand because I heard AIR OPTIX was better and could breathe much better than my Acuvue Advance.

I had NO discomfort with Acuvue Advance.

Anyhow, I went to PearleVision this time lol - I knew maybe it was a bad idea, but maybe I just assumed they had bad doctors? I like doctors that own offices in separate buildings - not sure why. And all my life, I've been going there, and not really sure why we had to switch and visit PearleVision.

Well he was kinda sloppy when he did the work lol. He held his finger up in the air and moved his hand with sloppy movements. I just had to laugh.

Well he also said AQUA was dailies and they are not, so I said okay, give me the night&day.

So my prescription was changed to BC 8.4 DIA 13.8

Which all of my life, and even my sisters, we have been DIA 14.0. BC was also 8.7 - since I was 12 or 13. And I've never had any discomfort...

Now my eyes hurt like hell. Every other minute, the contact lens just feels SO tight and my eyes hurt, until they water. I have to squint like crazy because if I open my eyes real wide, they become very sensitive. Even putting them on, I noticed they are VERY tight and small. Like a cereal bowl... The AIR OPTIX is a small cereal bowl, rim size. However, the Acuvue Advance I had, was a bigger rim size. It covered my cornea more fully. But now it seems like the AIR OPTIX is smaller and doesn't cover the cornea because of the DIA change...

$70/per box of contacts, should not hurt at all.

So I switched from Acuvue Advance BC 8.70 DIA 14.0

TO

AIR OPTIX Night&Day BC 8.4 DIA 13.8

Is that supposed to happen? I know different contact brands change BC and DIA, but I only heard of Silicone Hydrogel lenses switched. And I know Acuvue Advance is Silicone Hydrogel. However, my sisters contacts are not not silicone, just Hydrogel. So a different material requires different BC and DIA, I was told by someone on here, that was a doctor.

Update:

Nope, he did check it after I put them in.

I will certainly ask them if they can recheck!

If you are still watching this, could it also be the difference of hydrogel?

Going from galyfilcon to lotrafilcon?

Would it also be burning because of the diameter difference? I just think maybe the burning is from the different hydrogel?

My right eye feels fine. I just took the left eye out and I will keep it out for a while for my eye to relax.

Update 2:

Hmm haha thanks for the edit!

I was going to mention it seemed like the left eye was the problem... IT was very hard to remove - the right one was easy and the left one is like stuck on my eye.

I don't know if they said different hydrogels cause the size difference or just the brand. But I do see the brand change on 1800 Contacts, and some have 8.4 and 8.6, and some have 8.7 and 8.3.

Anyhow, I did go to the eye doctor and they tried a size up, and now I'm wearing 8.6 and they feel fine. :)

However, sometimes I blink, they seem to like readjust and I can feel them moving but it is nothing big.

Thanks for the help! :) I really do appreciate it. I know who to come to if I have any other issues.

Also, he did check my eye with the light thing that scans the eye and like moves haha with a mirror attached to it.

So they worked! :)

Thanks a lot! Again!

1 Answer

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  • Footprintz
    Lv 7
    8 years ago
    Favorite Answer

    They sold you Night & Day without a trial fit or even checking the fit on you ? That be bordering illegal...and certainly non professional.

    Almost every different brand uses a different set of parameters. It's not only silicone lenses that the sizes can change, that is common all the time with any kind of lenses. An 8.7 14.2 in one brand could be the best size in THAT brand , but an 8.6 14.0 in another brand will work as well...every different material affects the fit as much as the curvature and diameter.

    8.6/8.7 is a flat curve and the most commonly used because 70% of people fall within that range.

    8.4 is steep.....and rarely works for someone who has a flatter cornea.

    8.7 to 8.4 doesn't look right...I wonder why they didn't go for the 8.6...that would probably work.

    Just go back and complain that they don't fit. They are obviously fitting way too tight.

    EDIT *****

    You are too caught up in the different types of hydrogel being the cause. They are a different brand and different material...PERIOD. Hydrogel or any other material can cause the same problem. Even two different brands of lenses even with identical BC and Dia, could fit very differently because of the different material, which is why we always do trials. It happens with any type of lens, not just Hydrogel lenses. Who ever said just Hydrogel lenses had to switch sizes was full of crap.

    A different hydrogel has nothing to do with burning , it would do it in both eyes if the material was an actual problem. All lenses are hypo allergenic and don't cause reactions like that.

    So, earlier, your EYES hurt , now the right one is fine.

    If you can move that right one while it is on your eye, easily with your fingertip , it isn't too tight. That left lens maybe has a very small defect in it...a chip , a tear...even just dirty....those cause burning.

    The fact one eye is okay now probably means the left lens is the problem because something is wrong with it.

    Source(s): Optician
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