Cheiroscope: video, drawing samples and implications

Cheiroscope: video, drawing samples and implications

After a nice theoretical post, let's get down to the nitty gritty. How can we get a tangible look into how someone perceives his personal space? How can we determine inconsistent perception of space interfering with the construction of solid brain maps? As vision writes spatial equations for the muscles to solve, cheiroscopic drawing is an interesting way to gauge the state of ocular motor ability and spatial vision. During cheiroscopic drawing, one's visual system is completely stripped of contextual aids. Broader context often helps strabismics to get around and complete certain tasks…Read more …
The visual system’s important role in figuring out where you are

The visual system’s important role in figuring out where you are

Developmental strabismics often learn how to suppress sight coming through one eye. Many times they even learn how to alternate between both eyes. This is a useful short term neural adaptation but has many disadvantages in the long haul if not corrected. Having been, and to some extent still being, an alternator, I know how it works in practice and how it feels. If feels like you can shift between two ways of seeing. You are not only switching between your physical eyes but also between two viewing positions in your mind. You…Read more …

VIDEO: Current convergence status + The ‘time-of-day-effect’

For a previous post I uploaded a video recorded in December, 2011 and went on to compare it to a video captured in May, 2014. The images were self-explanatory and it was pretty spectacular! I recommend for anyone with strabismus to make videos of their eyes. It's great to monitor VT progress and, in doing so, keep motivation levels high. Adhering to that idea I made some more flattering videos. In those earlier videos I converged on a pen. In 2011 I failed radically. In May 2014 it finally started to look like…Read more …
Some vision testing in front of the webcam

Some vision testing in front of the webcam

Inspired by Dr. Charles Boulet's article on the Cover Test, I  felt like doing some testing in front of the webcam. First you can see me doing some saccades, or jumping movements, going from one corner of my laptop screen to the other. I started off quite well but then my left eye started lagging and had trouble keeping up. This resulted in some double vision when looking at the right. I slowed down and paid more attention to remedy the problem. In order to reduce 'slippage' my left eye needs to improve…Read more …

Football without stereoscopic depth perception (video + optometric analysis)

HISTORY As a strabismic child that suppressed one eye at the time, I played football (soccer) during every recess period at school. Clearly I had no stereo vision. Nonetheless I was a fairly good player and loved playing. I could be totally absorbed by it. At one point I also tried playing in a club. Because of my vision dysfunction I didn't have the energy to both keep up with my school work and go to the training sessions so I had to quit. Suppressing one eye is a wasteful business. I had…Read more …

The accommodative rock demonstrated

This is a video of me performing an exercise called 'accommodative rock' or a version thereof. You need a tiny letter chart to hold in your hand and another big letter chart on the wall in front of you. The exercise simply consists of alternately reading a letter from the paper in your hand and then a letter from the chart on the wall. That sounds pretty easy and straight forward but with a history of strabismus (surgery), it isn't. Both stimuli require very different responses from both they accommodative as vergence systems. It's…Read more …

You want more evidence? I’ll give you some evidence right here.

“Every man can, if he so desires, become the sculp­tor of his own brain” - Santiago Ramon y Cajal (1852–1934) Ever since I was four years old I've been cross-eyed (accommodative esotropia). My brain learned to suppress the image of one eye by turning the eye inwards. Over the years my visual situation changed and expensive mistakes were made. If you want to read the entire story click here. After the last surgery I had very little control over my eyes and they tended towards exotropia although that highly depended on the viewing direction.…Read more …

Strabismus and academia

Yes, so what about it? Well, it's complicated. I will try to explain it though. It's important to understand that my vision never could be relied on and it was always changing over the course of time. Initially as a first grader I had trouble learning how to read. At the time I didn't get why it was so hard for me but my mother tutored me a little bit and in the end I was able to read. I read slowly but I had a very good understanding and retention of what I read.…Read more …

A glorious occasion in Michigan

Heather, who has made the occasional guest appearance on this blog, spoke as a patient on the Annual Michigan Vision Therapy Study Group Meeting about her experience with vision therapy. Beneath you can find part of her testimony. It is really inspiring and gives hope to the rest of us out there trying to follow in her footsteps. When I spoke to her about the video she said she wanted to emphasize how damn hard it was to find out about Vision Therapy and find the right person to help you. Furthermore she…Read more …

No more emotional meltdowns for Asher

That kid is me but only ginger. Housework did take ages, I had a lot of meltdowns and actually threw a few chairs in school once! Click on the link to watch the video. No more meltdowns for Asher!Frustration and emotional meltdowns are sometimes a consequence of binocular vision problems, such as Convergence Insufficiency (CI), visual focusing and tracking problems. Take a look and hear how Asher and his mother describe what life was like for Asher before and now after his vision therapy. Asher also gives a special word of thanks to…Read more …