Contact Lens City

Posts Tagged ‘diameter’

Question by FahrenheitHolic: 14.5 diameter of a contact lens; is it the bigger the number that makes your eyes bigger?
14.5 diameter of a contact lens; is it the bigger the number that makes your eyes bigger?

Best answer:

Answer by RP
I’m not sure what you mean by how the number makes your eyes bigger?

The diameter of the lens just means how many millimeters is it from one side to the other. Some are 9.2, some are 15.

Answer by Dave
Ive always felt that the lenses should fit your eye, and you shouldn’t force eyes to ‘fit’ the lens. Maybe more an issue with selection of base curves, but it also applies to fitting patients with lenses that are too large.

We choose diameter to provide good coverage. So yes, a larger cornea will require a larger diameter lens.

In the grand scheme of things, though, a 14.5 is a rather large diameter lens; thus more prone to being too big on many patient’s eyes (larger diameter is typically used for toric lenses).

Know better? Leave us your own answer in the comments below!

Popularity: 1% [?]

by L. Marie

Question by JC: What exactly does contact lens diameter measure?
The contact lens I am currently using is 14.5 in diameter, but I am currently out of the country and having a hard time finding 14.5 lenses. Does this diameter measure the diameter of the pupil/area of the contact lens covering the pupil, or does it measure the diameter of the entire lens itself? Also, what differences will I experience if I switched to a 14.2 or 14.0 lens?
Sorry, I meant iris, not pupil.

Best answer:

Answer by Ashwin P
The diameter of the contact lens depends upon the diameter of the cornea but there is no hard and fast for that.Lens should be 2.0 mm larger than the diameter of the cornea. I think it depends upon the availability of the lenses.No differece between 14.2 and 14.0

Answer by Anna F
honestly, you probably won’t notice a difference. it is the diameter of the entire lens. certain brands only come in one diameter, but what will make a difference is the base curve (the 8.5 or 8.7, etc). 14.5 is actually very large, the largest size, so i would think (although not from experience) that going smaller would be more comfortable, as that part of your eye is used to having a contact lens on it. if you were going from small to large it may be uncomfortable having a lens on a new part of your eye (if that makes sense).

Answer by PG23
It’s the diameter of the lens itself. In most cases, you won’t notice much difference at all. WIth colored lenses, they tend to be 14.5 so that they cover more of your eye and you won’t have your natural color sticking out past the edges.

I would not recommend that you wear a different lens other than what you are prescribed, though. Don’t just order something else because you are out of the country. Lots of websites will deliver all over the world, so just go to CoastalContacts.com and order your correct lenses. If you have the boxes with you, you can just get the brand name and all the numbers you need off the side of the box.

Give your own advice below!

Popularity: 2% [?]

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• what is the difference for contacts if diameter is 14 2 or 14 0

Do they make opaque colored contact lenses for someone who has a base curve of 8.8 and a diameter of 14.0?
I would appreciate a link to a website that sells them for my type of eyes.
Thanks!

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• base curve contacts bad fit

I currently wear the Frequency 55 toric lenses with a base curve of 8.7 and diameter 14.4, i was wondering if there are any contact lens brand that have colored lense for astigmatism. I searched up the FreshLook ColorBlends Toric Contact Lens but their diameter is 14.5, will .1 make a difference anyways?

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• does anyone know of a brand of contact lenses for people with astigmatism

What is the standard base curve for contact lenses? My insurance covers a check up every 2 years and I just got a check up and the doctor didn’t check my base curve or diameter. I can’t afford another check up, so I what wondering if there is a standard base curve. If the standard base curve is not 8.4, 8.7, or 9.0, which one should I pick?

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is there any website that i can get contact lens that actually have my prescription diameter and Base Curve size? Ive been to a lot of websites and a lot of them seem to have a set number of diameter you can choose such as 14 and for base curve such as 8.6 or something. is this because this is the standard eye base cure and diameter?

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Well, I’m going to get contact lenses soon and I want do know what the doctor does. How do they measure the diameter of your eyes. Does wearing contacts for the first time feel irritating?

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hi! my prescription is as follows:

Right eye:
Spherical–0.50
Cylindrical–1.50
Axis-20 degrees

Left eye:
Spherical-0.00
Cylindrical–1.25
Axis-170 degrees

Please someone suggest which type of contacts should i go for-torics or any other, coz i visited an optician recently who suggested that i should not go for torics considering my cylindrical number is not that high. But i have heard that people with cylindrical number should always go for torics. My age is 20 and i have been wearing glasses for about 1.5-2 years. Also the optician i visited gave me a contact lens pair to try which wasn’t torics and i felt comfortable wearing them, though i tried them for only for a few minutes. I have never tried contact lens before. Please someone suggest me as to what type of contacts should i go for…thanks a lot!
The optician gave me those lens for using only for 5 minutes and i have read in many forums that people often are not comfortable wearing torics..and if i should only go for torics, then which is the best brand of torics and its price? and is there something called the diameter of the eyeball and do opthalmologists in India measure the eyeball before giving the contact lens prescription because i have read that the various parameters of the eye like the diameter of the eyeball, etc, vary from person to person and the contacts have to be custom made to fit the eyes of an individual…please suggest…thanks a lot!

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Why is it that Ciba Vision/Focus Dailies only make lenses with Base Curves of 8.6 and Diameters of 13.8

whereas

Johnson & Johnson/Acuvue only make lenses of Base Curve 8.5 and Diameter 14.2????

I don’t understand.

Does that then mean that depending on your prescription, you are restricted to which company you can buy lenses from???

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My contact lens prescription is 8.3 base curve, 14.0 diameter and -3.25 strength. Can I wear contacts that have an 8.6 base curve comfortably and safely, or will they slide around/effect my vision? I’ve been wearing contacts since I was about 10, so I know how to take care of them, etc, and I know that a 14.0 diameter is much different than a 14.5 or a 15.0 because my optometrist had me try on the different sizes to see the difference, but he never mentioned base curve to me.

Thanks so much for your input!

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Hi!
i currently use clear contact lenses on a daily basis
my prescription is
8.4/14.4 -5.5 -3.25 x170
and 8.4/14.4 -5.5 3.25 x10
i recently ordered circle lenses in the exact same prescription (except the diameter was 14) but after the first wear it started to make my eyes burn on contact, they turned red and watered constantly. i could not keep them in for a prolonged period of tI ame. the store i bought them from has been understanding about my issues, and offered to let me try a toric lens in a different brand as they believed i had an allergy to the lens i bought. however, they haven’t responded to me for a week and i just want to be able to wear circle lenses! would i be able to see if i just bought a pair of regular circle lenses without the 3.25 cylindrical value? they would be 60 dollars cheaper and i’m so tired not getting a response from the store and not being able to wear them
thanks in advance

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For Halloween I am ordering extreme fx contacts to complement my costume.The ones i want to order are the Pinhead/Black gloss ones ( the ones which my your eye look like a single big black dilated pupil) My question is, even though the base curve is the same as my normal contacts ( 8.6), does the diameter affect the way the lens fits?? ( my normal contacts diameter is 14.2, the diameter for these is 15.0)
Oh and if anyone has ever worn these specific lens…how is the vision through them?? is it like normal lens??…Thanks!

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I bought Circle lens CK – 105 Geo .It is 14.8 in diameter, pretty huge.
When I wore the lens, my eyes really got uncomfortable( it’s like ,a huge dirt is on my eyes), teary and blood -shot(red). I am sure that I put the right side of the lens and even tried the wrong side,I clean the lenses thoroughly but same thing always happen. I ask my friend to test the lens(if it has damage) and let her wear it, and whoa, her eyes are so so fine with the lens. I wore my old contacts which is small in diameter and my eyes are fine, but my eyes aren’t fine with the large lens( attempted to wear it 5 tI ames but really very uncomftable). What is wrong?
My eyes are @ pain ( i can’t tolerate)when wearing those huge lens and my tears keep fallin’

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I bought Circle lens CK – 105 Geo .It is 14.8 in diameter, pretty huge.
When I wore the lens, my eyes really got uncomfortable( it’s like ,a huge dirt is on my eyes), teary and blood -shot(red). I am sure that I put the right side of the lens and even tried the wrong side,I clean the lenses thoroughly but same thing always happen. I ask my friend to test the lens(if it has damage) and let her wear it, and whoa, her eyes are so so fine with the lens. I wore my old contacts which is small in diameter and my eyes are fine, but my eyes aren’t fine with the large lens( attempted to wear it 5 tI ames but really very uncomftable). What is wrong?

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I wear soft, aspheric lenses. I have the same Power (-3.25) in both eyes, the same Base Curve (8.7) and the same Diameter (14.3). When you come to the check out on nearly every contact lens sight it doubles the amount of money so you’re buying one lot for both eyes. However, if I have exactly the same prescription, surely I can just buy an L or R set (those who have bought online will know what I’m on about).

Another thing too… even though I’m wearing aspheric lenses, my optometrist says that my astigmatism is very mild. Does this mean that I can get away with just normal lenses?

I’m also looking for some lenses that are aspheric, but coloured.

Loads of questions/requests, I know.
Thanks in advance!

Lucy..

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I mean, he knew I was there to check if it was ok for me to wear them, he gave me my lens prescription, and it lacks the diameter and base curve, and i don’t know what other measurement, and he just put down i should get "acuvue", but didn’t specify which kind. I tried to buy some, but they told me they wouldn’t sell them to me!
I’m planning on going back to my dr. to ask hI am to fill in the missing info, but it makes me wonder if he knows what he’s doing at all? Is it common for doctors to forget this sort of thing?

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so i am planning to buy circle lens from circlelens2u.com and i have acuvue 2 contacts currently. acuvue 2 water content is 57% and the one i want from circlelens2u is 38% … the base curve and the diameter is the same measurements in my eye but the water content is different. so i can i still wear those circle lens?

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I recently got an eye exam and my first contact lens fitting. On my prescription, I was given the strength, and brand of my contacts. I called my optician’s office a few days later asking the secretary to look through my records and tell me what my Base Curve and Diameter was since it was omitted from my prescription. I found out that my Base Curve was 8.6 but the secretary stated there was nothing on record about the Diameter? So what the heck does that mean? Is the Diameter of my contacts not I amportant?
My contact brand is Coopervision’s Biofinity Sphere. I looked online for the contacts and at certain contact stores they offer different Diameters? That’s why I was kind off thrown off? It only comes in one Base Curve, but I don’t know what’s up with the Diameters and I’m frankly surprised nothing was written down on my record =/
I checked Coopervision’s website (http://www.coopervision.com/us/patient/contactlenses/brands/biofinity/biofinity/) under the related topics there’s a .pdf file called "biofinity package insert" and on the first page it says:

BIOFINITY SPHERE and ASPHERE contact lenses parameters:
o Diameter: 13.5 mm to 15.0 mm
o Base Curve: 8.0 mm to 9.5 mm
o Center Thickness: 0.08 mm to 0.15 mm (varies with power)
o Powers: -20.00 D to +20.0 D

Should I go see my optician in person and clear this up?

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If your patients are up to date on their eye exams and would like to order a plano lens, do you make them come in for a fitting? Do you even have halloween lenses in stock that you would need for the fitting? What if the lens I want is the exact same base curve and diameter of my prescription lenses? Please give me some insight. Thank you!

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i wear circle lens (14mm diameter) and they have no prescription as i do not require vision correction.

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