What are the symptoms of convergence problems?

• Words are moving while reading

• Blurred or double vision

• Impaired concentration

• Eyestrain

• Drowsiness and disorientation while reading

• Headaches

• Vision may be clear but uncomfortable

Convergence Explained:

Under normal circumstances, the eyes must turn inwards to view objects at near, this is called Convergence. Convergence problems occur when an individual has an outward natural or resting eye posture at near which means that they must exert more effort to bring the eyes inwards while reading. Converging too much may also be a problem. This is when the eyes struggle to return to a straight-ahead gaze. This can cause problems such as eyestrain and headaches.

The exact cause of convergence difficulty is unknown. Convergence insufficiency can arise following infection, traumatic brain injury, certain medications, and neurodegenerative diseases (e.g. Parkinson’s) or Myasthenia Gravis.

What can we do?

The main treatment for convergence problems is vision therapy. Prism lens spectacles can be prescribed to reduce symptoms.