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 good reading comprehension but read very slow and have never been able to fluently read aloud. Just doing my homework was enough of a physical training.
“It is important to understand the many aspects of vision to be examined, and to gather quality data on each patient, as the visual system is a covert system, where the process and outcome are evidenced not as “visual”, but as motor or verbal outputs.” – Vision Rehabilitation
I’ve NEVER been able to effectively juggle a football before, let alone 33 kicks without it touching the ground. The only reason why I can do this now, after years of not playing, is that I can keep both of my eyes focused on the ball. Even though I don’t have full blown stereoscopic depth perception yet, my brain already makes these subtle trigonometry inferences about its position. That never happened before. The first 17 years of my life I was suppressing one eye, then I lived through a couple of years of double vision and now the eye alignment is starting to be incorporated at a cortical level. This is an aspect of binocular vision which is evidenced as motor output as I do not SEE any depth yet. Cool, right?This was again confirmed in my VT session (#74) today. I had a 90 to 95% success rate deciphering the relative position of objects while viewing tranaglyphs and polarized vectograms by ‘grasping them’ in midair. It’s unbelievable! I was just staring at my hands thinking ‘magic hands’. Magic brain rather! This depth perception stuff is creeping up on me silently!
|Finally my brain is slowly starting to make subconscious inferences about
depth based on the input and position of both eyes!
If your brain doesn’t do that, you’ll end up like this physicist.IMAGE BY BILL AMEND
In light of that, these new found football skills make sense. The target is pretty large and it’s a bit further than the distance range used for reading. Thus it requires less accuracy and less converging than reading. A nice stepping stool. This is good news as my optometrist said that this kind of motor feel for depth often precedes the actual seeing of depth.
My Dutch VT friend Yvette used to be horrible at catching things. This, to her own surprise, improved dramatically after working on her binocular vision skills for a year or two. She now says ‘I can see the hole in the Frisbee and actually catch it’. When she, unrelated to her DIY VT efforts, enrolled for a course of slack-lining (walking a tightrope), one of the exercises was to catch things while keeping balance. ‘Even though I was shaking like hell and did not find a stable balancing position, I was able to catch everything. Now I can also catch with my left hand, even without looking directly at the object.’
This is remarkable for a clumsy strabby who was never able to catch anything before! As she already acquired some stereovision, this is something to look forward to. Nevertheless, the benefits of stereovision are much broader than being able to catch stuff. From what I read, it’s a whole different way of life. For now the punch line is that I’m making good progress and the best is yet to come. We ain’t seen nothing yet!
Additional reading on vision, the brain and football
strab rehab or you just like my blog… 😉