Convergence insufficiency is a common vision problem that makes it hard to focus on close-up tasks like reading or using a phone. With proper treatment, most people can improve their symptoms and see more comfortably at near distances.
When you look at something close to you, your eyes naturally turn inward toward your nose. This movement is called convergence. It helps both eyes focus on the same spot at the same time.
Convergence insufficiency occurs when one or both eyes have trouble moving inward at near distances. Usually, one eye will turn outward when trying to look at close objects. This is called intermittent exotropia because the eye does not turn out all the time.
Convergence insufficiency affects about 5 out of every 100 children. It can also occur in adults. The condition sometimes causes behavior that looks like ADD, ADHD, or dyslexia because children may struggle to focus on schoolwork.
People with convergence insufficiency often experience difficulty reading and concentrating. Other symptoms include double vision, headaches, and eye strain. These problems happen because the eyes are focusing on different spots instead of working together.
Stressful situations, illness, or tiredness can make the outward turning of the eye more frequent and noticeable. Closing one eye or squinting may relieve symptoms temporarily but does not treat the underlying problem.
Convergence insufficiency is often missed during school vision screenings. These screenings typically test visual acuity, which measures the sharpness of vision at a distance. Since convergence insufficiency does not affect how clearly you see, it can go undetected without a comprehensive eye exam. Our kids symptom checker can help parents identify signs that may point to a convergence problem.
Patching was once used to treat convergence insufficiency, but it is no longer the recommended approach. Because the eye only turns outward during near work rather than all the time, patching does not address the core problem.
Patching the stronger eye forces the patient to use only the weaker eye. However, once both eyes are uncovered, the same eye continues to turn outward. Without training the eyes to work together, the convergence insufficiency remains.
Patching can also reduce depth perception and binocular vision. These abilities depend on using both eyes together, and patching disrupts them.
Standard glasses lenses will not treat convergence insufficiency. They only improve the clarity of vision and do not help the eyes turn inward properly.
Glasses with prism lenses may be prescribed in some cases. The prism bends light so that objects appear to be in a different location. This can reduce double vision because both eyes seem to focus on the same spot.
However, prism lenses do not correct the outward turn of the eye. They only relieve symptoms while the glasses are worn. The physical problem remains both with and without the glasses.
Vision therapy directly treats convergence insufficiency by training the eyes to turn inward properly when looking at near objects. Unlike patching or glasses, vision therapy addresses the root cause of the problem rather than just managing symptoms.
One well-known vision therapy exercise is called pencil push-ups. A small letter or picture is placed on the end of a pencil. The patient follows this image with their eyes as the pencil moves toward the nose and away again.
The goal is to keep the image clear and single throughout the movement. When successful, this shows that both eyes are converging and focusing on the same place.
Research by the College of Optometrists in Vision Development and Rehabilitation and the National Eye Institute found that office-based vision therapy, supported by at-home exercises, is the most effective treatment for convergence insufficiency. Patients who only did at-home therapy did not experience the same improvement in their symptoms.
Vision therapy at an office with a trained therapist provides several advantages. The therapist can make appropriate corrections and track progress through regular measurements and evaluations. They can also add other exercises that improve convergence along with related visual skills.
Insight Vision Center Optometry offers vision therapy through The Eye Gym at Insight Vision Center Optometry. Patients work one-on-one with trained vision therapists who guide them through customized treatment programs. Each session builds on the previous one to strengthen the visual system over time.
Dr. Valerie Lam, OD, FAAO, FOVDR leads the vision therapy program. She holds fellowships from the American Academy of Optometry and the College of Optometrists in Vision Development and Rehabilitation. She is board certified in Vision Therapy, Pediatric Developmental Vision Care, and Vision Rehabilitation. Dr. Ariel Chen, OD also provides vision therapy services with a focus on learning-related vision problems.
Treatment typically involves weekly in-office sessions combined with daily at-home exercises. The length of treatment varies based on the severity of the convergence insufficiency and how the patient responds. Many patients notice improvement within the first few weeks of therapy.
A comprehensive eye exam can detect convergence insufficiency. The eye doctor will test how well your eyes work together at near distances and measure your near point of convergence. This tells them how close an object can get before your eyes can no longer stay aligned.
Yes. While convergence insufficiency often begins in childhood, adults can develop it too. Head injuries, concussions, and prolonged near work can contribute to the condition in adults. Vision therapy can be effective for patients of all ages.
Most patients participate in vision therapy for several months. The exact length depends on the severity of the condition and individual progress. Some patients see improvement within a few weeks, while others need longer treatment to reach their goals.
Vision therapy treats the underlying convergence problem, but some patients may still benefit from glasses for other vision needs. Your eye doctor will evaluate your child throughout treatment and recommend the best approach for their specific situation.
For most patients, the improvements from vision therapy are long-lasting. Some patients may benefit from occasional maintenance exercises to keep their skills sharp. Your vision therapist will provide guidance on what to do after completing the program.
Coverage for vision therapy varies by insurance plan. Some medical and vision insurance plans provide partial or full coverage. The staff at Insight Vision Center Optometry can help you understand your benefits and payment options.
