March 31st, 2013
Personal Training and Orthokeratology
Bottom line, the orthokeratologist is like a personal trainer, they give you stuff to do, and if something goes wrong you have to stop your wearing/training and discuss your worries and explain to them what's wrong so they can make adjustments. If you don't participate in the process as much as it requires, results can be not as wished. Let's say your trainer tells you to lift above your head 45 lbs and you decide to try and lift 210 lbs, you can break your back. If your orthokeratologist tells you ton contact them if you see any concern with your treatment, you have to stop treatment immediately and get in touch with them. If for example, some double vision starts to appear, you have to stop immediately and inform your orthokeratologist, if you don't, the side effects will probably get worse. You have to trust them fully and inform them of everything, since they are the professionals, and you're the one who an communicate what's happening.
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replied May 4th, 2016
I know this thread is 3 years old now but I have a question for anyone still coming across it. It seems to me that many of these problems are caused by the lens not staying where it ought to through the night, could this problem be solved by using something to hold it in place? My thought being magnets suspended above the eyes and some sort of metal / magnetic material added to the lens itself, inside it of course, to prevent it moving off-centre. My reluctance to try them myself comes mainly from the fear slippage would happen during the night as I toss-and-turn a lot in my sleep.

So, could the idea of magnetic suspension work? My initial concern is that rapid eye movement would cause you to just scrape the inside of your eye against the lenses if they were fixed in place, so perhaps rather than suspend them from a magnet, have the magnets set up to stop the lens from leaving a certain perimeter. This would help I think but certainly not eradicate the problem.

Also, could having magnets near your eyes for hours each night be dangerous? Many people wear magnetic bracelets to help blood flow, could doing this to our eyes have an adverse effect?

Anyone have any thoughts on this? I'm not looking to get bogged down in the logistics and technicalities of it, after all it's just speculation at this point, I just want to discuss whether there's any feasibility to it at all and maybe touch upon potential problems. Also, if anyone has any ideas on other ways to ensure it stays central? This is just for my own curiosity really, but who knows, if we come up with some good ideas perhaps someone who makes these lenses will see the post and experiment with them.

Any thoughts greatly appreciated. JW
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replied June 10th, 2016
Please see my more general response below (directed to you at the end). Not a bad idea, but not feasible, practical or necessary.
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replied June 10th, 2016
Please consider this when reading the previous posts.
I understand that the earlier posters in this thread had issues that arose coinciding with Ortho-K lenses, however I think this needs to be clarified for potential Ortho-K patients who are taking this into consideration when making a decision on whether to pursue treatment or not.

I am not an optometrist nor do I sell Ortho-K lenses but I do work in the industry and am familiar enough to address this misinformation. None of the problems described above appear to be actual issues with Ortho-K. First, the topic of floaters/debris is understandably worrying, yet this is not a corneal issue. Floaters are generally related to the vitreos (inside the eye) or retina (back of the eye) and would not be affected by a contact lens. You'll notice that floaters are not a side effect of normal contact lenses, which are worn by a huge population and not really that different from an Ortho-K lens. The only way a lens might "cause" floaters is by improving components of your vision that may appear to magnify pre-existing floaters, which does not actually make them worse.. just more visible.

Second: halos, flaring and all the other visual issues are an issue with the fitting of the lens, not the actual lens. Off center lenses and poorly fit lenses will cause correction changes in the wrong part of the cornea, which can cause all of the above issues. This comes down to the fitting skill and follow up evaluations by your optometrist. If you are having these issues and your optometrist is not acknowledging them, you likely need a more skilled Ortho-K specialist, or you may not be a suitable candidate.

For example, Dry-eye is going to be especially difficult with any type of lens. If you have dry eye and are still going ahead with Ortho-K your optometrist should be taking extra care to work with the dry-eye symptoms to reduce any discomfort you would have with the lens.

And finally, in response to John Wick... the basic answer is likely no. First of all, the lens material is a rigid gas-permeable plastic compound, which is not magnetic. Even if it weren't for the serious regulatory challenges of completely altering the material, it is unlikely you'd be able to maintain all the other qualities in the material that are important while making it magnetic. Beyond that though, it simply wouldn't be worthwile, because a properly fit Ortho-K lens should have perfect centration without the need for what would likely be a cumbersome nighttime headpiece. I would imagine magnetic eye patches would be much more prone to being bumped and moved around at night then the lens covered by your lid.

I won't get too bogged down in details of how lenses center, but there are a number of parameters that can be adjusted so that the lens contact points on the eye cause it to center. The lens wants to sit on the area that causes the least pressure in any direction so will naturally rest there. A properly fit lens that gets pushed off center will naturally recenter. An example would be if you put a bowling ball on a trampoline it will naturally move to the center. When you push it to the sides it will still return to the center. But if you pull a number of springs out of one side, so that the pressure on the trampoline is no longer equally distributed the ball will naturally slope in the direction of that side. (Maybe not a great example.)

Interestingly enough, the lens only makes contact at the edges. It is not even touching the center of your cornea where it causes the changes in vision. The shape of this area of the lens causes differences in pressure which slowly reshape the tissue. A properly fit Ortho-K lens should not be touching the center of your eye. You may be interested to watch this tutorial i found (for Optometrists) on how to fit difficult Ortho-K cases. This will show you some examples of the differences between a properly centered and poorly centered lens. https://youtu.be/Cmy9m6Eutlk?list=PLgi9D8J AJWeKlQ5VZFEf3FHEWCjgMJlRY Precision Technology's youtube page has a number of tutorials on Ortho-K.
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replied July 11th, 2016
sleepsee orthokeratology
I am using sleepsee orthokeratology i think this is the best contact lenses i have ever been used. No need to use it 24 hours. I am using it only at night and remove after wake up.
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replied January 12th, 2017
CRT paragon lenses
suffering now with major eye infection due to CRT lenses. lenses created tear on removal, and while under medical care, became a huge problem. referred to corneal specialist that is working to correct and save my vision in affected eye. do not approach or attempt these lenses. huge risk, little to no temporary reward
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replied June 7th, 2017
Please read this if you are thinking about trying Ortho-K or unsure as to whether to stop wearing them.

I started ortho-k (gas permeable) lenses back in January 2017. It's June now and I've been off them for 3 months. I can't tell you how much of a mistake it was for me to get involved with them in the first place. They just sounded perfect and I couldn't find any issues with side effects long-term. I wish I had read this forum.

It is worth noting that I have a high pain threshold and I'm also a very pateient human being. Ortho K has exceeded both of these.

It took 2 months to get anything close to acceptable with wearing them. I did absolutely everything as I was told to do. Didn't miss a single day and perfect with cleaning them. The comfort is disgraceful but you do somewhat get used to it. Don't expect to be able to ever sleep on your side again. After my optician made got my third pair made for me I could see fairly close to what normal contacts would give me in the day but that always wore off by 3-4pm. By early evening onwards in low light it was a joke. Looking back, I cannot believe I tried them for so long. 3 months of good daylight vision but medium light double vision and lower light MESS.

This isn't even the reason I stopped wearing them. I stopped wearing them because I was rapidly getting the most invasive eye floaters and didn't want it to get any worse. What I am now left with 3 months on is permanent eye floaters and many are in my central vision. They are absolutely horrendous and visible all of the time apart from the night. I am furious with myself for pursuing this but I am even more furious with my optician or anyone offering these lenses. Nobody had mentioned the risk of eye floaters or PERMANENT double vision.

It is ENTIRELY UNTRUE that adverse side effects (long term) have nothing to do with these lenses. I haven't worn mine for 3 months and still, of course, have the floaters and double vision in the night against anything with contrast. I am guessing that the savagely dry eyes you wake up with after wearing the lenses must put some level of stress on the back of the eye or vitreous.

I cannot strongly discourage anyone enough from trialling these. It is absolutely not worth your time. Spend the same amount on super thin daily lenses.

Because my eye floaters are so bad, I have changed quite a few things in my life to help cope with them. Message me if you're struggling with these and I can help with some solutions. MAC OSX's invert colours mode is an absolute godsend for one!

I sincerely hope this deters anyone who's thinking of trying these hideous lenses
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