Radius of curvature 8.5 and 8.6. Contact lenses johnson & johnson acuvue oasys - “before buying, study the specifications carefully! very individual!

08/17/2016 00:22 // John
Hi all. The radius of curvature is very important. Most people fit the standard radius of 8.5-8.6 ... But if you wear lenses with this radius and at the same time feel tension eyeballs, after a couple of hours - redness of the eyes and too large, enlarged objects, then this radius does not suit you, and you cannot wear such lenses, because you will plant your eyesight (with personal experience say). In this case, you need 9.0! Good luck everyone!

05/25/2015 19:44 // Eugene
By the way, the fact that you started wearing lenses does not mean that you should forget about visiting an ophthalmologist. At my last visit to the doctor, I found out that it turns out that scratches can form on the eye from the touch of fingers or grains of sand can scratch the cornea, let's say they worked in the country or in the forest something hit the eye. This is what happened to my eyes. The doctor advised to pierce the eyes with corneregel in order to heal all these damages on the cornea. Now everything is in order, but periodically I dig and keep it always ready.

05/23/2015 17:33 // Stas
Radius is of course an important parameter, but I also think that plus or minus one value does not really affect most people, but the choice is always good, especially since the radius value does not affect the price. But this is not all that you need to remember when wearing lenses, especially if they are high-quality, reusable models. Care for them is also important, and such a simple thing as a solution also matters. I didn’t attach any importance to this, but this spring I felt that it was uncomfortable to wear lenses and my eyes began to itch. It turned out that I was allergic to the previous solution, plus flowering. The doctor advised me to switch to a universal one, I tried biotra, everything got better right away. It not only cleans the lenses better, but also wets them for a long time (20 hours). I will use them now.

09.02.2015 16:06 // Inna
Can I change lenses with curvature 8.6 to 8.4? For some reason Johnson and Johnson don't have lenses with my curvature, and I really like them.

10/14/2014 15:59 // Egor
Yes, the article is interesting, otherwise I knew my radius, but I didn’t really think about its influence. Disagree with Alina. If the radius did not have such a value, then there would not be such a series. There is no benefit to the manufacturer from this, on the contrary, only a hassle. So, you need to follow the instructions of the doctor and use only your radius. And “tested on my own” experience in this case is not a serious argument at all. I also wear Pure Vision 2 and I'm happy with it in all respects. Before last day socks (and they are designed for 30 days) do not become cloudy (and after that too, but I always follow the instructions), they are perfectly cleaned with a solution (although deposits almost do not accumulate on them anyway), the clarity is excellent.

09/04/2014 14:11 // Vasily
A very good article, otherwise on some forums people write that they did not even think about this parameter (!). They will buy without looking, and then they blame the lenses for everything. You are doing the right thing by educating. I found excellent PureVision 2 lenses for myself. They have simply excellent sharpness and breathe great all day long, I don’t feel any discomfort, but earlier, with other lenses, only with gels and drops, I could live until the evening. They also have absolutely no glare and halos from light sources when you drive a car in the evening - it is especially felt.

26.08.2014 15:03 // Elena
I wanted to know which lenses, besides acuve moist, are suitable for curvature 9.0???? I consulted only in the salon, they said that the curvature is 9.0, but I did not find lenses that are reusable with such a curvature, can I replace them with 8.5 or 8.7? And how can it be expressed that the lenses do not fit in radius?

05/17/2014 14:40 // Victoria
I wanted to know which lenses, besides acuve moist, are suitable for curvature 9.0????

02/05/2014 13:02 // Tatyana
GOOD AFTERNOON!
I WEAR LENSES WITH A CURVATURE OF 8.6. NOW I WANT TO CHANGE LENSES, T.K. THERE IS DISCOMFORT.
and the CURVATURE OF THE DESIRED LENSES IS ONLY 8.5 AND 9.0. WILL THEY SUIT ME? THANKS.
AND WHICH LENS CURVATURE IS SUITABLE FOR ME?

05/03/2013 15:00 // Asya
8.6 from 8.7 almost do not differ in wear.
but my 9.0 is specifically different from the standard 8.6
9.0 is very hard to find and I pre-order them. The question is this: 9.0 means that my cornea is too sunken or, on the contrary, too convex? I just thought))))

03/12/2013 18:46 // Alina
Folks, curvature doesn't really matter, most people fit 8.3, 8.4, 8.5, 8.6, 8.7!
Buy and wear, do not be afraid!

On the box of soft contact lenses you will find the following information:

PWR- This is the optical power of the lens. It can be with a + sign and with a - sign. This is exactly the indicator that will provide your eyes with clear vision.

BC- This is a measure of the base curvature of the lens. It usually varies from 7.8 mm to 9.0 mm. The comfortable “fit” of the lens on the eye depends on this indicator.

What is the base curvature of a lens?

This is an indicator of curvature rear wall lenses that are directly attached to the cornea of ​​the eye. The fact is that the curvature of the cornea of ​​​​the eye is different for everyone. Just as we wear standardized clothing sizes, the base curvature of the lens should match the curvature of the eye itself. The more precise the fit of the lens to the eye, the more comfortable the eye feels. How to determine the base curvature? An ophthalmologist determines this parameter on a special device called an autorefkeratometer. Having measured the basic curvature of the eye, he writes this parameter into the recipe.

DIA is the diameter of the eye. It is also measured by a doctor.

What determines the clarity of vision, the comfort of wearing and dressing lenses?

Well, of course, from correctly defined parameters of curvature and optical power of the lens itself, firstly. Secondly, from the material from which the lens is made. After all, the comfort of landing the lens also depends on whether the material is elastic or sufficiently elastic. Well, as for wearing comfort, you can only feel it in practice, by trying on lenses and wearing them for some time before your eyes.

Below we provide standard curvature parameters from different manufacturers.

How important is the conformity of the curvature parameter when moving from one manufacturer to another?

Small deviations, especially in big side- will not harm the health of the eyes and in practice the eyes are not felt. It's about about the transition from a radius, for example 8.5 or 8.4 to a radius of 8.6. When switching to a smaller radius, lens intolerance to the eyes is possible - rubbing, discomfort, pain. If the difference in the transition is significant, then the eyes react as follows: if the radius is too large, the lens "floats" on the eye, lagging behind the eyes during rotation and blinking, if the radius is too small, the lenses "crash" into the eyes, squeezing them. For eye health, the second option, of course, is very undesirable.

Any contact lenses, like clothing, have their own parameters (sizes). The determination of your parameters should be made by a qualified doctor contact correction vision in large ophthalmological centers (even with perfect vision). It is advisable not to contact small salons or companies, as they often lack special medical equipment, which may cause your parameters to be determined incorrectly. We have come across this quite often.

What parameters of contact lenses do you need to know, and which do not?

1. Radius of curvature- the most important parameter in contact lenses. It completely affects how the lens feels in the eye.

The most common radius of curvature is 8.6, less common is 8.4, all the others (7.6, 7.8, 8.0, 8.2, 8.3, 8.5, 8.7, 8.8, 8.9, 9.0, 9.2, etc.) are very rare. For example, about 95% of people wear exactly 8.6, 4% - 8.4, the remaining 1% - everyone else.

That being said, about 50% of people can wear all radii of curvature (like some any clothing size), while the other 50% can't. If they put on lenses with a different radius of curvature (for example, 8.7 instead of 8.6), then they will not be able to wear them due to severe pain, pain, and the sensation of a foreign object.

Ophthalmologists warn that even if you are one of those who can easily put on lenses with different radii of curvature (short or long time, often or rarely, etc.), then this can lead to ingrowth of vessels into the cornea. Therefore, it is better to go to a good medical center and determine the radius of curvature of your eyes.

If you do not have any eye diseases, then the rest of the parameters will not be important for you and will not affect the quality of wearing contact lenses.

2. Diameter is not like that important parameter, as the radius of curvature and on comfortable wearing does not affect in any way. Diameter may only be important when buying tinted, colored or carnival contact lenses. Standard is 14.0-14.2

3. optical power needed only for those who have vision problems and who have poor vision.

(- ) for nearsighted people, that is, for those who see well near and poorly far away. The worse you see into the distance, the more (-)

(+) for far-sighted people, that is, for those who see poorly near and well far away. The worse you see up close, the more (+)

If necessary, this parameter is also determined by a qualified ophthalmologist.

4. Axle and cylinder defined only for special toric contact lenses used to correct astigmatism. AT conventional lenses these options are not used.

Conclusion: if you do not have any eye diseases, it is extremely important to determine your radius of curvature in an ophthalmological medical center (contact vision correction)

Happy and safe shopping!

I have tried many lenses. With most statements about side effects agree. The lenses feel thicker than BIOMEDICS, although the parameter indicates one - 0.07 mm in the center. Dense, so the risk mechanical damage below. They dress harder than the same BIOMEDICS or AIR OPTIX, because. less elastic due to their density and due to the specific shape (edging). In the convenience of putting on and fixing, AIR OPTIX is better (the edging has a different shape and fits snugly), it does not crawl over the eye during the day)). Important indicators for comparison:

ACUVUE OASYS with HYDRACLEAR Plus:
* Wear mode - daily (replacement every 2 weeks) and extended (replacement every week - 6 nights without removal).
* Lenses have an inversion indicator (to determine the inside and outside of the lens) and UV protection.
* Contact lens material: Senofilcon A, silicone hydrogel
* Moisture content of contact lenses: 38%
* Oxygen transmission of contact lenses (Dk/t): 147
* Base curvature (radius) - 8.4mm and 8.8mm
* Diameter: 14.0mm.
* Packing - 6 lenses.

Biomedics 55UV (6pcs):
* Contact lens wearing mode: daily and flexible
* Term of replacement of contact lenses: replacement in 1 month.
* Contact lens material: Ocufilcon D
* Moisture content of contact lenses: 55%
* Oxygen transmission of contact lenses (Dk/t): 28.2
* Thickness in the center (at -3.00 D), mm: 0.07
The eyelid does not feel the lens due to the thin (0.05 mm) edge, biconvex design and smooth surface.
* Base curvature (radius) - 8.6; 8.8; 8.9 mm
* Packing of contact lenses: blister 6 pcs.
* Contact lenses provide UV protection

Sometimes the base curvature of the lens is not suitable. Let's say if you need 8.6-8.7, and you take 8.4 or 8.8, then the lens "sits down" more difficult and less comfortable to wear, slides over the eye (when the base curvature is greater), moves out. So it was with me. With a base curvature of 8.6, you should not take 8.4 or 8.8 (and Oasis only with such parameters)! Fixation is less, and sharpness (focusing) goes in the center of the lens, so when it moves out, the effect of "clouding" appears. It's annoying optic nerves and the eyes get tired faster, turn red, which affects general condition(hence the headaches). Then it's better to take them off! No drops will help. Another feature of these lenses is that when a mote gets in, a real nightmare begins!))) The eye waters, squints from unbearable pain, in other lenses this happens softer (you can blink a couple of times and the mote will come out without acute pain). Although you can sleep in them, it is better to remove any lenses at night! In the morning, my lenses always dried up (((. You should not wear them for more than two weeks - they gradually change composition, a burning sensation in the eye may begin, and they also deform, dry out (become thinner). Despite the difference in oxygen transmission, my eyes tolerate Biomedix better (in good conditions, no air conditioning, no heat). If anything, I just bury it with moisturizing drops and that's it. Oasis, on the other hand, reacts more sharply (discomfort is stronger under bad conditions and more painful, because the moisture content is less and, due to high oxygen transmission, they dry out faster and “stick” to the cornea). And last but not least, the price. An oasis is not for everyone. Therefore, I put a solid 4!
It seems to describe everything)))