Vision disorders
Vergence problems: eye strain, double vision and how vision therapy helps
Vergence abnormalities — such as convergence insufficiency — happen when the eyes have difficulty working together to focus on objects at different distances. They can cause eye strain and blurry vision, especially during long periods of reading or close work.
Urgent: Double vision that comes on suddenly needs urgent attention — go to the nearest hospital emergency department.
What are vergence abnormalities?
To see one clear image, both eyes turn inward together for near objects and outward for far ones. When that teamwork is weak, reading and screen work become tiring, and depth perception can suffer.
Symptoms of vergence problems
- Eye strain or fatigue, especially when reading or using a computer
- Blurry or double vision
- Headaches
- Difficulty focusing on nearby objects
- Frequently squinting or closing one eye to see better
How are vergence problems treated?
Vergence issues can often be treated with eye exercises, corrective lenses or other vision therapy. A binocular vision assessment shows how well your eyes work together and guides the plan.
When to see an eye care professional
If you experience these symptoms, see an eye care professional who can diagnose the problem and help improve your vision and comfort.
Frequently asked questions
When to go to a hospital instead
Go to the nearest hospital emergency department immediately if you have:
- Sudden loss of vision
- Flashes of light or a shower of new floaters
- Eye injury or chemical splash
- Severe eye pain or a very red, painful eye
- Double vision that comes on suddenly