tag:blogger.com,1999:blog-4478157900665324374.post4677705366771876840..comments2023-07-02T11:01:07.446-04:00Comments on Squinty Josh: Abnormal retinal correspondence - new and improved!Unknownnoreply@blogger.comBlogger9125tag:blogger.com,1999:blog-4478157900665324374.post-3277605784483684432015-07-19T07:48:23.920-04:002015-07-19T07:48:23.920-04:00OMG. Thankyou! Your experience is exactly like m...OMG. Thankyou! Your experience is exactly like mine.<br /><br />I've been working on vision therapy and have realised that sometimes my eye is exotropic, but I can still see out of it, I just have widened view, and the "stitching" in the middle is kind of weird. I can't really perceive it properly.<br /><br />What is the thing you were talking about with Dr Greenwald and prisms? Got a link?tommy two eyesnoreply@blogger.comtag:blogger.com,1999:blog-4478157900665324374.post-55363356893652747892012-06-14T20:15:42.889-04:002012-06-14T20:15:42.889-04:00I have some questions related to the diagram that ...I have some questions related to the diagram that shows how the brain uses one false fovea and one true fovea to create depth perception. <br /><br />If the person has no depth perception (the brain is not using a false fovea) why can't the eyes be trained to converge and the brain be taught to fuse the images from the true foveae?<br /><br />My reason for this question has to do with what my vision therapist told me about my goals.<br /><br />She said that true depth perception is not a realistic goal for me (that it is "off the table"). She also told me that it might be possible for me to use my peripheral vision to create a sort of faint version of depth perception.<br /><br />I am an alternating exotrope with panoramic viewing and no depth perception. I don't know if I have AC. (When I wear red/green glasses half the room is red and half is green. I have no fusion. I don't know if I have doplopia against the rule. I do remember a prism test that created diplopia but I don't know if it was crossed or uncrossed.) <br /><br />Perhaps someone here can explain why I have to settle for a faint version of depth perception. My preference of course would be to get full depth perception via NC, but I might be willing to use AC and remain wall-eyed if necessary.<br /><br />Oh and while I'm at it: Maybe someone has an idea about what it is that my therapist is aiming for. (What does she hope to get my eyes and brain to be doing in order to achieve this faint depth perception?)<br /><br />Thanks,<br /><br />FrancesWaterdragonnoreply@blogger.comtag:blogger.com,1999:blog-4478157900665324374.post-13697402830923542202012-05-28T15:48:31.398-04:002012-05-28T15:48:31.398-04:00Here is an piece with information about several ki...Here is an piece with information about several kinds of Anomalous Correspondence. I'm now more confused and in-over-my-head than before. But perhaps this will help clarify the issue for others. (Below the link I've listed the different kinds of AC addressed.) <br /><br />-Frances<br /><br />http://arapaho.nsuok.edu/~salmonto/vs3_materials/Lecture26.pdfI<br /><br />Normal correspondence. <br />Anomalous correspondence <br /> A. Harmonious anomalous correspondence <br /> B. Unharmonious <br /> 1. Unharmonious AC <br /> 2. Paradoxical AC, Type I <br /> 3. Paradoxical AC, Type IIFrances McIntoshhttp://francesmcintosh.com/noreply@blogger.comtag:blogger.com,1999:blog-4478157900665324374.post-9176009288520332522012-05-28T15:48:23.654-04:002012-05-28T15:48:23.654-04:00Here is a piece that addresses Anomalous Correspon...Here is a piece that addresses Anomalous Correspondence. It lists and describes a variety of types of correspondence (which I've listed after the link). I am now even more confused and over-my-head that ever. But maybe this will help clarify the issue for others. -Frances<br /><br />http://arapaho.nsuok.edu/~salmonto/vs3_materials/Lecture26.pdf <br /><br />I. Normal correspondence<br />II. Anomalous correspondence<br /> A. Harmonious anomalous correspondence<br /> B. Unharmonious<br /> 1. Unharmonious AC<br /> 2. Paradoxical AC, Type I<br /> 3. Paradoxical AC, Type IIFrances McIntoshhttp://francesmcintosh.com/noreply@blogger.comtag:blogger.com,1999:blog-4478157900665324374.post-78350415022719913082012-03-25T16:00:46.890-04:002012-03-25T16:00:46.890-04:00I don't know why my post got all mis-formatted...I don't know why my post got all mis-formatted! Apologies. Hope you can sort it out. I may try to post again sometime and see if I can get it right.Frances McIntoshnoreply@blogger.comtag:blogger.com,1999:blog-4478157900665324374.post-37412675882765671012012-03-25T15:50:51.333-04:002012-03-25T15:50:51.333-04:00Hi Josh, This is wonderful stuff. However for a c...Hi Josh, This is wonderful stuff. However for a couple of reasons (problems that are mine and have nothing to do with your presentation) I'm having trouble following everything here (including replies.) So I'd like to ask two questions about just one aspect of this presentation. <br />In this presentation you included the following:"Here's where it gets complicated. Instead of (or in addition to) suppression, the brain can alter the correspondence. Let's say that your left eye deviates 45 degrees outward. Your brain operates under the newer, more realistic assumption that your right fovea points straight ahead, and your left fovea points 45 degrees to the left. That is an abnormal or anomalous correspondence.In the case of exotropia, this can lead to a widened, panoramic visual field. Instead two eyes operating binocularly to make one image, the two eyes operate monocularly to make one panoramic image, neatly joined in the middle."-------I have two questions about this: 1) In a situation like mine (see below) where are the foveae?2) If I had surgery to align my eyes would I lose my "panorama?" (Note: The risk of double vision has been deemed to be extremely small for a couple of reasons.) Here's my situation: I am an alternating exotrope with excellent control and awareness regarding choice of which eye I'm "using." I have panoramic viewing that works with both eyes. (When "using" the right eye the left eye turns out and creates the panorama and visa-versa). The turn-out is about about 35 diopters in each eye when it's not being "used." Because of the degree of turn-out there is a small area of overlap where the two eyes see the same thing. I suppress that area. Note: I also have some suppression of the image from the eye that I'm not "using" but the image is still there and is useful to me.(I apologize if these questions have been asked and answered elsewhere. If they have, would you please direct me there? I also apologize if I am lacking information needed to discuss this issue in a useful way. If that's the case would you please suggest a good place to go for that?)Thanks!Frances McIntoshhttp://francesmcintosh.com/noreply@blogger.comtag:blogger.com,1999:blog-4478157900665324374.post-41443056552364840162012-01-26T03:47:11.237-05:002012-01-26T03:47:11.237-05:00Hi Josh,
thank you so much for explaining this - ...Hi Josh,<br /><br />thank you so much for explaining this - it seems like the only explanations that exist are for professionals, not for the people affected. <br /><br />I do think this is what I have. To make a long story short, I had a very large angle esotropia and started to develop lazy eye in childhood, but was treated and have since the age of 6 been alternating effortlessly. I also always felt I had great eyesight, never any trouble with dizziness, lack of focus or peripheral vision as described by Susan Barry in Fixing my Gaze. Was told that I could have surgery when I got older, for purely cosmetic reasons. At the age of 16 I wanted it, rather badly, but the day before surgery I went through a lot of tests and they looked rather surprised and worried and said we're sorry, can't do the surgery, it would ruin your eyesight. After lots of optometry they decided to correct it a bit, as much as was possible without causing permanent double vision - with prisms that corrected my eyes properly I was seeing two very clear double images with my right eye, while the left one (which is stronger) apparently suppressed. I didn't really try to understand what was going on at the time, but I assume now that the problem was anomalous correspondence and I developed exactly the double vision that the optometrists expected I would have. Thing is , if I focus, the second image becomes much less prominent and it never bothered me at all. Since they said nothing more could be done, I never bothered going to any second opinion or looking for additional treadment, it was just like adding pain to old wounds and I wanted to avoid that. But, now after almost 30 years, I went to another specialist and she says she thinks I should have surgery anyway since I can suppress the double image quite well especially with the left eye. It is very ironic though to feel you have great eyesight although one of your eyes is totally off upwards-inwards, and that the price of correcting it might be high. In my case, they also said my eye would probably go back to its corner position if they tried to correct it too much, or suppressed so much that it would go blind. I wouldn't have bothered with it today either unless it hadn't been such a massive social handicap. Now I want to try and challenge that "nothing can be done"-scenario as best as I can, including getting vision therapy after surgery to try to convince my brain to rewire. Thanks again for very well explained info :) and good luck with the excercises! Anna Veedernoreply@blogger.comtag:blogger.com,1999:blog-4478157900665324374.post-70862752624645388662011-04-21T23:21:48.996-04:002011-04-21T23:21:48.996-04:00I have strabismus and I'm 40 years old. I had ...I have strabismus and I'm 40 years old. I had corrective surgery when I was two, would there be any hope for improving my vision now? I'm pretty sure my vision switches between suppression and panoramic field. I've never had an eye doctor explain why I see the way I do as well as you just did. Most of them just dodge my questions or blow them off. I would love to improve my depth perception.Shannonnoreply@blogger.comtag:blogger.com,1999:blog-4478157900665324374.post-52036992604052408192011-02-23T19:21:02.938-05:002011-02-23T19:21:02.938-05:00Thanks, Dr. Press. I had read that normal/anomalou...Thanks, Dr. Press. I had read that normal/anomalous correspondence really happens in the brain, and not in the retina, and I certainly believe it. That's why I'm always talking to my brain when I'm doing my VT homework.<br /><br />"Hey brain. These things are located in the same space, so point your eyes there and start seeing it that way!"squintyjoshnoreply@blogger.com