By Lauren Fournier, PT, DPT
If you or a loved one has trouble with:
- Tired, sore or uncomfortable eyes (eyestrain)
- Difficulty reading — words seem to float on the page, you lose your place or you read slowly — which might cause you to avoid reading or not complete schoolwork
- Double vision (diplopia)
- Difficulty concentrating
- Squinting, rubbing or closing one eye
It may be due to a “convergence insufficiency.” The cause of convergence insufficiency isn’t known, but it involves a misalignment of the eyes when focusing on nearby objects. The misalignment involves the muscles that move the eye. Typically, one eye drifts outward when you’re focusing on a word or object at close range.
There are exercises that can help re-train your eyes and improve your vision. The exercises are called “eye push-ups” and are performed using a Brock String. The Brock String is about ten feet long with colored beads spaced at various distances from each other. One end of the string is fixed to an object in front of you while the other end is held in front of your nose like the gentleman in the picture. You then go through exercises focusing your eyes on the different beads. Over time, and with enough practice, your eyes will become more coordinated and help resolve many issues associated with your eyes.