Oculomotor Dysfunction
Oculomotor dysfunction is a problem with eye movement control — how the eyes jump between words (saccades), follow a moving target (pursuit), and hold steady (fixation). It is one of the most common visual issues underlying reading difficulty in children.
Also known as: Eye Tracking Problems · Saccadic Dysfunction · Pursuit Dysfunction
What Oculomotor Dysfunction Is
The eyes perform three core types of movement: fixation (holding steady on a target), pursuit (smoothly following something that moves), and saccades (rapid jumps from one point to another, like word-to-word reading). Each is a learned, controllable motor skill — and each can develop poorly or be disrupted.
Oculomotor dysfunction is the clinical name for inefficient or inaccurate eye movements across one or more of these systems. The eyes may overshoot or undershoot targets, lose place mid-task, or struggle to hold steady fixation.
A person can have perfect eyesight clarity (20/20) and still have oculomotor dysfunction. Eyesight measures what you can see; oculomotor function measures whether the eyes can get to the right place at the right time.
Signs You May Notice
- Skipping words or losing place while reading
- Using a finger to track on the page (long past the age it should be necessary)
- Re-reading the same line without realizing it
- Slow reading speed despite knowing the words
- Difficulty copying from the board to paper
- Trouble with tracking a ball in sports — catching, batting, fielding
- Reduced reading comprehension that drops further with longer passages
- Head movement while reading instead of moving just the eyes
How It Affects Everyday Life
In children, oculomotor dysfunction usually shows up in school — slow reading, dropping comprehension, frustration with assignments. In athletes, it shows up as inconsistent ball-tracking. In adults, it often shows up as fatigue with reading or computer work and difficulty with proofreading or detail-oriented near work. The frustrating part is that the person can usually do the task — but it takes much more effort than it should.
How It Is Identified
Oculomotor dysfunction is diagnosed through specific tests during a comprehensive vision evaluation by an optometrist trained in developmental vision.
Testing typically includes the Developmental Eye Movement test (DEM), the King-Devick test, direct observation of pursuits and saccades, and clinical screening tools that compare eye-movement performance against age-normed expectations.
These tests are not part of a routine eye exam or school vision screening. Many kids with oculomotor dysfunction have been told their vision is "fine" because the test was looking at clarity, not control.
How Vision Therapy Can Help
Eye movement is a motor skill. Like balance or coordination, it improves with structured, progressive practice — and there is strong evidence supporting vision therapy for oculomotor dysfunction.
The goal of therapy is to build accurate, automatic eye movement: the eyes go where they need to go, when they need to go, without conscious effort. This usually translates to faster, more accurate reading, better tracking in sports, and less fatigue with near work.
Treatment combines saccadic drills (jump-to-target work at progressively faster speeds), pursuit activities (smooth following), fixation training, and reading-specific tracking exercises so the gains transfer to functional tasks.
How SuccessfulSight™ Addresses Oculomotor Dysfunction
SuccessfulSight™ includes a structured set of eye movement activities that target saccades, pursuits, and fixation as part of the program. Activities progress in speed, complexity, and visual load as the patient improves.
The program is prescribed through a participating optometrist who confirms oculomotor dysfunction is present and provides the baseline measurements that guide therapy.
From there, SuccessfulSight™ delivers daily home-based training through guided iPad activities, real-space hands-on work, and therapist support. Progression is automatic — the program adjusts difficulty session-by-session based on performance.
Related Skill Areas the Program Addresses
Is SuccessfulSight™ Right for This?
SuccessfulSight™ is designed for patients ages 6 and up. Oculomotor dysfunction is one of the most common reasons children are referred — it shows up in reading, school performance, and sometimes in athletics.
Common Questions
Isn't reading just about knowing the words?
Knowing the words is necessary but not sufficient. Reading is a complex visual-motor task: the eyes have to jump accurately to each word, then to the next line, while the brain decodes meaning. If the motor part is inefficient, the cognitive part runs out of working memory long before the reader gets through the page. Some kids with strong language skills are still labeled "slow readers" because of this.
Is oculomotor dysfunction the same as ADHD?
They are different but can look similar — and they can co-occur. ADHD is an attention disorder; oculomotor dysfunction is a vision-control problem. Some kids diagnosed with ADHD also have undiagnosed oculomotor problems, and treating the vision can dramatically reduce the apparent attention symptoms. A binocular vision evaluation is the way to find out.
Can adults benefit from eye movement therapy?
Yes. Oculomotor skill can be trained at any age, though the strongest gains are usually in school-age children and young adults. SuccessfulSight™ is built for patients 6 and up.
Will glasses help with oculomotor dysfunction?
Glasses correct refractive error — they don't train eye-movement control. Some providers prescribe glasses or prism as a supportive measure during therapy, but the treatment itself is structured eye-movement work over time.
How will I know if my child is improving?
You'll usually notice it in everyday life — less complaining about reading, less avoidance, fewer lost places on the page, better stamina with homework. Clinically, your prescribing optometrist re-measures eye-movement performance at follow-up visits to confirm objective improvement.
Talk to a Participating Optometrist
The best next step is a comprehensive evaluation. A participating optometrist can determine whether oculomotor dysfunction is present and whether SuccessfulSight™ is the right fit.