Medical Forum / General / Vision / May 2006
Strange worsening and return of vision
|
|
Thread rating:  |
norman_conway@yahoo.com - 02 May 2006 20:48 GMT I had something happen to me a few months ago that I am completely unable to understand. I'm mildly farsighted (about +1 in both eyes, with an add of 2 and some cyl for astigmatism), and wear a combination of glasses. I have notice from time to time that wearing contacts for a long period of time makes me a bit more farsighted, but usually not much.
One night a few months ago I took out my contacts and felt *very* farsighted--like my glasses did little to help it, except when looking through the reading part and even then it was not enough power. Next morning, the same thing. I wore my glasses throughout the day, struggling to see, and made a last-minute appointment with the doc to get it checked. My Rx had jumped to +3.75 in both eyes, with about the same amout of cyl. I told her the story, and she told me to come back tomorrow, which I did, and got the same Rx again.
I had the glasses made, and at first they worked fine, but after a period of several weeks my eyes returned to the previous Rx of +1 or so. I checked my blood sugar, which was fine; otherwise my health is great for a 45 year old. Can anyone explain this? Could I have gotten the wrong base curve on my contacts and remolded my cornea? Maybe a lot of latent hyperopia which appeared for no reason? I have no clue
Neil Brooks - 02 May 2006 21:47 GMT > I had something happen to me a few months ago that I am completely > unable to understand. I'm mildly farsighted (about +1 in both eyes, [quoted text clipped - 18 lines] > the wrong base curve on my contacts and remolded my cornea? Maybe a lot > of latent hyperopia which appeared for no reason? I have no clue I don't know my rear end from second base, but ... I feel a presbyope coming on.
Like ... maybe you were always a +3.75, but -- as a younger man -- your accommodative mechanism happily bridged the gap for you.
But now -- now that you are an OLDER man (I turned 42 today, so I can tease) -- it's not quite so easy, so your accommodation is sort of going out the window, leaving you with a clear look at your "full refractive error."
Should that sort of thing happen *suddenly?* No. Not to MY limited knowledge, but ... that doesn't mean that presbyopia isn't what you're experiencing. It may be that it hasn't really been sudden, but that you sort of just got to your limit. Were you experiencing any problems going from far to near vision recently? Any other visual symptoms??
Doc's?
norman_conway@yahoo.com - 02 May 2006 22:20 GMT I've been a presbyope since my mid thirties, and have stabilized with an add of +2 for the past several years. In any case, this does not explain why it happened suddenly, then slowly returned to my usual prescription. I have no other vision symptoms, and my health is otherwise fine.
Dr. Leukoma - 02 May 2006 22:35 GMT > I've been a presbyope since my mid thirties, and have stabilized with > an add of +2 for the past several years. In any case, this does not > explain why it happened suddenly, then slowly returned to my usual > prescription. I have no other vision symptoms, and my health is > otherwise fine. There are no presbyopes in their mid-thirties. You appear to be a hyperope with accommodative spasm. One way to tell would be to have a cycloplegic refraction. If that is close to +3.50, then there you have it.
DrG
norman_conway@yahoo.com - 02 May 2006 22:53 GMT > > I've been a presbyope since my mid thirties, and have stabilized with > > an add of +2 for the past several years. In any case, this does not [quoted text clipped - 8 lines] > > DrG I've had multiple cycloplegic refractions, and aside from this one I've never had a script anywhere near +3.50. I may gain 0.50D or so when cyclopleged, but not 2-3D.
CatmanX - 02 May 2006 23:25 GMT I concur with Greg, I would be leaning towards a temporary loss of ciliary tone as the cause of increased plus. An OK shift of 2.75D is highly unlikely (although I won't say impossible).
dr grant
Neil Brooks - 03 May 2006 01:15 GMT > I concur with Greg, I would be leaning towards a temporary loss of > ciliary tone as the cause of increased plus. An OK shift of 2.75D is > highly unlikely (although I won't say impossible). > > dr grant Maybe I *am* back in the game here....
If you have an accommodative spasm, then it is quite possible (was all too true for me) that your 'garden variety' cycloplegic -- say Tropicamide -- will NOT elicit ALL of your hyperopia.
In my (extreme) case, it took six months of nightly use of cycloplegia and then ... bam ... one morning, I awoke with about 2.50 diopters of additional farsightedness.
[again: Docs??] Might be worth hitting you with Cyclogyl??
LarryDoc - 03 May 2006 04:45 GMT > If you have an accommodative spasm, then it is quite possible (was all > too true for me) that your 'garden variety' cycloplegic -- say > Tropicamide -- will NOT elicit ALL of your hyperopia. FYI, tropicamide is considered to be a mydriatic (causes pupilary dilation), not a true cycloplegic. It's cyclo effect is secondary, highly variable and generally of little consequence.
LB, O.D.
Neil Brooks - 03 May 2006 19:34 GMT >> If you have an accommodative spasm, then it is quite possible (was all >> too true for me) that your 'garden variety' cycloplegic -- say [quoted text clipped - 3 lines] >dilation), not a true cycloplegic. It's cyclo effect is secondary, >highly variable and generally of little consequence. Thanks, Dr. B, for the additional info.
Dr. Leukoma - 03 May 2006 03:06 GMT I repeat: a 35 year/old who needs a bifocal is not a presbyope, but a latent hyperope. I'm not ruling out the influence of a contact lens. Even a soft lens can change the shape of the cornea. However, this would happen each and every time you wore the contact lens.
I am still of the opinion that you have more latent hyperopia. As someone suggested, you may need a stronger cycloplegic. I am willing to take bets that over the next 10 years, your manifest prescription will shift increasingly towards more plus.
DrG
Dom - 03 May 2006 11:21 GMT Were the contacts Focus Night&Day or Purevision? If so, you may have been wearing them inside-out without realising, and given yourself unintentional ortho-K. It happened to a patient of mine, who recovered fully a few weeks after discontinuing lens wear. There are other case reports out there - it's a known phenomenon.
Just one idea.
Dom
> I had something happen to me a few months ago that I am completely > unable to understand. I'm mildly farsighted (about +1 in both eyes, [quoted text clipped - 18 lines] > the wrong base curve on my contacts and remolded my cornea? Maybe a lot > of latent hyperopia which appeared for no reason? I have no clue Dr. Leukoma - 03 May 2006 12:12 GMT IMHO, I don't understand how a person could wear a Purevison inside out and not know it, and in both eyes at the same time, but I guess it could happen.
In "what will they think of next" department, would you believe that a group of OD's has already "patented" the use of soft lenses for orthokeratology?
DrG
norman_conway@yahoo.com - 03 May 2006 14:59 GMT > IMHO, I don't understand how a person could wear a Purevison inside out > and not know it, and in both eyes at the same time, but I guess it [quoted text clipped - 5 lines] > > DrG It is very easy to tell when my CLs are inside out, and I am sure this was not the case.
I have thought a bit more about this being latent hyperopia, and it might be. I have had problems w/ eyestrain since I was a kid, and reading has never been easy. Also, I have noticed for many years now that my vision has a myopic shift during the day--perhaps up to 1D at times, though I can't be sure--which makes getting a refraction difficult. If I am refracted in the morning, my glasses seem over-plussed by the evening, and vice versa.
I guess the one thing that puzzles me, though, is that I never get used to wearing higher plus glasses. My understanding is that, over time, accomdative spasm should be relieved with higher plus glasses. And since my glasses range from +.075 to +3.75, I am wondering why the higher Rx does not eventually become acceptable.
So what type of cycloplegic might work if this is a case of latent hyperopia? Is this something I can use that, over time, might stabilize my Rx (albeit at a higher level than I would like) and potentially relieve eyestrain? I'm an MD so I could get hold of it and give it a trial and see what happens.
Thnaks for all the thought and suggestions on this!!
Mike Tyner - 03 May 2006 15:17 GMT > I guess the one thing that puzzles me, though, is that I never get used > to wearing higher plus glasses. My understanding is that, over time, > accomdative spasm should be relieved with higher plus glasses. It makes intuitive sense that accommodative spasm _should_ decrease, but most eye doctors can remember patients who couldn't accept full plus.
Accommodation and convergence are locked together and spasm of accommodation affects convergence too.
Most likely the "failure to accept" means that relieving accommodation makes the eyes struggle to stabilize at a new convergence posture. Usually it works, but sometimes it doesn't.
-MT
Neil Brooks - 03 May 2006 21:56 GMT >So what type of cycloplegic might work if this is a case of latent >hyperopia? Is this something I can use that, over time, might stabilize [quoted text clipped - 3 lines] > >Thnaks for all the thought and suggestions on this!! Hi. Ol' Johnny One-Note here again:
I think you could get pretty thorough cycloplegia with either a couple of drops of Cyclogyl -- maybe 15 minutes apart, or with Homatropine (maybe a touch less effective), or -- if you want to remove all doubt, and can live with 10d - 2wks of symptoms -- four days of Atropine.
The last is the gold standard of "total cycloplegia."
If what you have is accommodative spasm, or accommodative infacility, or ciliary spasm, or--more generally--accommodative dysfunction, then you will likely want to have the doctor push the most plus power on you that you can accept, both in a distance Rx and in a near Rx (whether using bifocals or separate reading glasses), watching your eye alignment carefully to check for any esodeviation that might need to be managed through adjustments to the powers or through addition of prism.
In some cases, you've developed enough "hypertonicity" in your ciliary muscles that it's difficult for you to accept much additional plus. In MY experience, I used cycloplegic drops every night (lower-strength; effects gone by morning) for months, eventually "breaking the cycle."
But ... NOTE WELL: virtually all cycloplegic drops use a preservative called Benzalkonium Chloride that has known cytotoxic effects to corneas. They should not be used long-term, *especially* if you have any pre-existing ocular surface issues OR dry eyes.
It *IS* possible to get your "cramped," or "spasmed" eyes to learn to "relax," with time.
Another thing that I do is what's called "periocular warming" to help relieve small amounts of accommodative spasm.
Make/buy yourself a corn/rice bag ... like so:
http://www.quilt.com/MiscQuilting/RiceBags.html
Warm it in the microwave (I use about 2min on high) until it's warm (NOT hot). Place it over your closed eyes for about 10 minutes a couple times a day.
It works. No voodoo. Actual science. Here:
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1 5885788&dopt=Abstract
OR http://tinyurl.com/obpyd
Best of luck!
Neil
acemanvx@yahoo.com - 04 May 2006 04:10 GMT Very interesting story. If he in fact has pseudomyopia or latent hyperopia and relieves it, wont he see worse with latent hyperopia? He will need a higher plus glasses and see worse without glasses. I have pseudomyopia, probably about 1.5 diopters left of it. Natural vision improvement helped relax some of my pseudomyopia.
norman_conway@yahoo.com - 04 May 2006 22:13 GMT > Very interesting story. If he in fact has pseudomyopia or latent > hyperopia and relieves it, wont he see worse with latent hyperopia? He > will need a higher plus glasses and see worse without glasses. I have > pseudomyopia, probably about 1.5 diopters left of it. Natural vision > improvement helped relax some of my pseudomyopia. Well, given that it has always been hard for me to do close work for any length of time, I would be happy w/ stronger glasses if I could see comfortably.
acemanvx@yahoo.com - 07 May 2006 05:54 GMT bifocals may be your answer
|
|
|