The convergence insufficiency (CI) is due to physical limitations of the muscles that control the eyes. With vision training I was able to improve the condition considerably but not able to completely correct the insufficiency. The sports vision training I performed improved the CI condition and improved other visual skills as well for both tennis and badminton.
As a side benefit, the training also improved my ability to read and concentrate for longer periods of time. It also improved my ability to work with computer screens. Before the training, I was getting eyestrain/headaches, on a daily basis, after working at a computer monitor after just 2-3 hours. It was much worse at book reading distances. The eyestrain would happen after only 10-15 minutes of reading a book or other printed material. Before I learned that this was a learning disability due to a physical limitation, I assumed that I was just not a "book" learner or I was just too lazy to read and concentrate for extended periods of time. It would have certainly made school and life a whole lot easier if I had discovered this before graduating from college.
CI is certainly not the only visual limitation that can hamper your ability in reading, writing, learning, driving, and sports. Improving visual skills can, in turn, improve athletic skills. It can also benefit you in school, at work, and while driving. This certainly makes it worthwhile -- even if your visual skills aren't seriously flawed.
There are some online tests & training that can test and, possibly, improve some aspects of vision/visual skills. However, there are drawbacks to this since it is limited to 2 dimensions for the most part. It would also be limited for testing the range of your peripheral vision and some other visual skills. A behavioral optometrist can provide a more complete series of tests to identify visual limitations or visual skills that can be improved.
It might be worthwhile to purchase a Brock string (for $5-$10). It can be used to identify and improve CI or other binocular issues. It can also be used in a variety of ways to improve visual tracking and your ability to quickly shift your focus and convergence accurately.
Have you ever mastered the
Magic Eye stereograms? You need to be able to control focus and convergence independently to master these. Also check out the eccentric circles test:
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Escapa: another challenging test
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