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 …
Session 44: Doing time

Session 44: Doing time

I've been working with the Aperture Rule for two weeks now. The device once again demonstrates the things I have been explaining about vergence and accommodation. This device comes with two plates you can change. The one with the one hole is to train convergence and the one with the two holes is to learn how to diverge your eyes. Depending on where you put the plate the degree of difficulty changes and there are 12 levels. With both plates I can only reach level 4 but the reason why I can't make it…Read more …

Introduction to guidelines for treating vergence and accommodative disorders

In previous generations, when survival depended on the ability to hunt, fish, and farm, the visual system had to respond to constantly changing, distant stimuli. Good distance visual acuity and stereoscopic vision were of paramount importance. Today, the emphasis has shifted from distance to two-dimensional near vision tasks such as reading, desk work, and computer viewing. In some persons, the visual system is incapable of performing these types of activities efficiently either because these tasks lack the stereoscopic cues required for accurate vergence responses or because the tasks require accommodative and vergence functioning…Read more …