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Medical Forum / General / Vision / June 2005Contact lenses and double vision
I'm experiencing a bit of double vision in my left eye while wearing my contact lenses. My right eye is OK, so I think that this could be an astigmatism related problem... I have 0.5 (uncorrected) in my left eye and none in my right eye. Myopia prescription is -4.0L/-3.5R. It isn't double vision in the sense that I can see two copies of everything. What happens is that, with black items on white backgrounds such as on a computer monitor, a second "copy" of the black item appears above where the "real copy" is. And I think that these copies are always vertically displaced. It also happens with light items on black backgrounds. I had the same problem with other contacts... then I don't think that it's a fitting problem. And my right eye vision is always perfect. I have a few questions. Is my astigmatism causing this double vision? If this double vision is due to it, why don't I have this double vision problem with my old glasses? They don't have any astigmatism correction. Why aren't there contacts with 0.5 astigmatism correction if it can be so annoying? My OD says that my lenses are OK and this double vision should disappear... Thanks a lot! > I'm experiencing a bit of double vision in my left eye while wearing my > contact lenses. My right eye is OK, so I think that this could be an [quoted text clipped - 12 lines] > > I have a few questions. Is my astigmatism causing this double vision? Almost certainly. > If this double vision is due to it, why don't I have this double vision > problem with my old glasses? They don't have any astigmatism > correction. Are you sure? How do you know that? And if it's not corrected, why not? Does someone have something against correcting astigmatism??? > Why aren't there contacts with 0.5 astigmatism correction if it can be > so annoying? There are a few manufacturers of those, and it might be worth it to you. > My OD says that my lenses are OK and this double vision should > disappear... Maybe so, but don't count on it. It should be more like "you'll get used to it". Whatever... w.stacy, o.d. Because they are my OLD glasses, they ware made before I had this astigmatism. I have two glasses, one with astigmatism correction and other without it. I don't experience double vision with anyone. Why the problem only appears with contact lenses? Thanks :) I must assume that you are talking about soft lenses here, most likely a thin soft lens or disposable. If your cornea has high points and low points, the soft lens can drape between the two and give you that secondary image or ghost. There are two possible solutions. The first would be wearing rigid gas permeable lenses, as they can give you simply stunning vision when they are fit well. Another option is to wear a soft lens on the left eye that has an aspheric curve on it. These lenses really work well on low cylinders like -.50. I really like the Ultraflex Premiere 55% aspheric disposable lens, which is now owned by Coopervision. Yes, I'm talking about monthly disposable lenses. I think I can live with this double vision, it's only really noticeable when I'm using my computer. Just I wanted to know what is causing the problem and if these lenses could be damaging my eye :S I'll talk my OD about those Ultraflex contacts. Thanks BTW, aren't Focus Dailies aspheric lenses? I used to wear them and I had the same problem in my left eye. jorgito ha escrito: > Yes, I'm talking about monthly disposable lenses. I think I can live > with this double vision, it's only really noticeable when I'm using my [quoted text clipped - 4 lines] > > Thanks Nope. Focus Dailies, and all other Focus products are not aspheric. > BTW, aren't Focus Dailies aspheric lenses? I used to wear them and I > had the same problem in my left eye. [quoted text clipped - 8 lines] > > > > Thanks OK, I thought I read it in some message of this gruop. Thanks > Because they are my OLD glasses, they ware made before I had this > astigmatism. I have two glasses, one with astigmatism correction and > other without it. I don't experience double vision with anyone. Sorry, but the only way you can be sure is to have somebody put the lens on a lensometer. Lots and lots of people are walking around with astigmatism corrections and don't know it. Like an Rx -5.00 -.50 x 180 Most docs woudn't even mention the .5 cyl to the patient, or mention that the patient even has astigmatism. They would just say the person is a 5 D. myope. And astigmatism ususally doesn't *happen* like that, one day you don't have it the next day you do. It is pretty much there for good, since it is the shape of your eye that determines it. > Why the problem only appears with contact lenses? My guess is that in fact it is corrected in your glasses (have anyone put them on a lensometer, it probably won't even cost you anything), but there are other, more exotic explanations. But certainly, a spherical soft lens will not correct your astigmatism, if that is what is causing the doubling, and a half D. toric soft lens will, as will an RGP (usually), as will a pair of glasses. w.stacy, o.d. OK, I'll try to know it for sure. I'm doubting now. But I remember my OD saying something like "you have developed astigmatism" two years ago, my other glasses where 4 or 5 years old by then. So I'm thinking that my old glasses don't correct my astigmatism. But you are right, I cannot know it for sure if someone doesn't put my glasses on a lensometer :) BTW, why the double vision disappears at some moments (my vision is perfect then, even when I look at my computer LCD)? Thanks a lot. > > Because they are my OLD glasses, they ware made before I had this > > astigmatism. I have two glasses, one with astigmatism correction and [quoted text clipped - 19 lines] > > w.stacy, o.d. Just one more comment. I have put my right eye lens (of my new glasses) in front of my left eye and I think that some doubling appears, but I'm not really sure if it's due to the spherical correction difference between the two lenses (1D) or to that -0.50 astigmatism. > BTW, why the double vision disappears at some moments (my vision is > perfect then, even when I look at my computer LCD)? .5 cyl is pretty small, so it could easily be masked by several factors, including tear film meniscus effects, contact lens "tenting" or whatever, and even lighting conditions or eyelid position. w.stacy, o.d. It's curious, I have been using the computer for 15 or 20 minutes and my vision has been perfect. A few days ago the double vision didn't disappear for more than 2 or 3 minutes. I have been using glasses for 15 years and I'm a new contact lenses user, so I'm thinking that I could need some time to adapt to my contacts vision (besides the uncorrected astigmatism). Thanks a lot for your help! |
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