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 …
Strabismus, visual field loss and visual-spatial neglect

Strabismus, visual field loss and visual-spatial neglect

"Right after I lost vision in my eye, I was so bad at walking that I ran into a girl eating ice cream, and knocked her cone out of her hand. She screamed: ‘Are you blind!?!?’ I turned to her and said: ‘I am blind actually, I’m so sorry, I’ll buy you a new cone.’ And she said: ‘Oh my God! I’m so sorry! Don’t worry! It’s no problem at all! I’ll buy another one.’ So we walked into the ice cream store together, and the clerk said: ‘I heard the whole thing.…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 …
Head rotations, bar reading and bring on the prism flippers

Head rotations, bar reading and bring on the prism flippers

  Head rotations Last week, for the first time, I had a completely stable percept while doing my head turns. I couldn't believe it!  I thought I was suppressing or something but I wasn't. Both eyes were just heedlessly adjusting to the head movements without error. It must be great to be able to take these reflexes for granted! I had predicted this milestone for the end of April et voila. Another hurdle taken. The reflexes are not equally reliable every day but that, again, is a matter of time. Speaking of head…Read more …
Alternation, cyclopean eye and the attentional spotlight

Alternation, cyclopean eye and the attentional spotlight

As my eyes are aligned most of the time by now I have no real concept of alternating between both eyes anymore. Despite the mechanical alignment of my eyes, I still do not use them equally. My vision still seems to be rather lateralized to the right. When I intentionally give myself double vision by moving my eyes apart, the image from my right eye is still the 'main image' and the one from the left eye feels secondary. In fact, in double vision mode I can still alternate. I can switch main…Read more …
Pursuing a higher degree of visual freedom

Pursuing a higher degree of visual freedom

In my last blog entry I talked about 'visual reserves' and how important this concept is for long term comfort and for VT to be successful. The improvement of eye lens focusing and eye movement amplitudes individually is not enough for it to stick. You need to be able to execute those visual skills simultaneously, effortlessly and automatically. Another great illustration of this processes by Dr Maino is shown below. Mastering those skills paves the way for further consolidation and visual/sensory development of the brain. Check out the entire slide show for more…Read more …
Improvement of accommodation and vergence amplitudes is not enough

Improvement of accommodation and vergence amplitudes is not enough

I was going through my things and found a piece of information I vividly remember reading and highlighting two years ago. I was very excited to see something I already intuitively grasped written in the 'Optometric Clinical Practice Guidelines ' for dealing with 'Accommodation and Vergence dysfunction'. What an emotional moment it was. I was excited and somehow releaved... I was not going completely insane. At the same time I felt cheated by every doctor I had ever seen and a lot of work was left to be done under difficult circumstances. But…Read more …
Convergence Insufficiency, new glasses and gravity

Convergence Insufficiency, new glasses and gravity

Recently a fabulous piece of research titled 'Association between reading speed, cycloplegic refractiveerror, and oculomotor function in reading disabled children versus controls' by Patrick Quaid and Trefford Simpson came to my attention. It, as many other optometric research, confirms in immaculate detail the importance of vision in reading and learning. It's great to see such valuable research being done by passionate optometrists on a voluntary basis. You heard that right,  for ZERO of your preferred currency! It does not take millions of $$$ to see the truth and change lives for the better.…Read more …
Book review: Fixing My Gaze by Susan Barry

Book review: Fixing My Gaze by Susan Barry

After I read 'Fixing My Gaze' for the third time in three years I decided to write a long overdue review about the book that got this whole VT party started. I first read it during the summer of 2010. At the time I was undergoing all kinds of personal, academic and medical crises and I realized I was on my own. So I turned to the oracle that is Google and went looking for better alternatives to help me get rid of my double vision. This time in English. I discovered Vision…Read more …
Visual Impediments to Learning: What’s it going to be? Your health, your education or both?

Visual Impediments to Learning: What’s it going to be? Your health, your education or both?

Somehow I have always felt discriminated. I could never really put my finger on it but it seemed like the normal rules didn't apply to me. Things always were a little bit harder on me. Now it's totally obvious this was because of a motor and sensory brain issue. Of course, kids don't think about their brains. What is striking though is that over the years people have been jumping through all kinds of hoops to make things even harder on me. Parents, educational and medical system alike. Now, I have been fairly…Read more …