eye care support
Convergence Problems
Convergence is the coordinated movement of both eyes inward so they can focus on a close object.
To see clearly and comfortably at close distances, both eyes must aim precisely at the object being viewed. When this alignment system doesn’t develop properly in childhood, close work can become tiring and uncomfortable.
Convergence problems can lead to eye strain, blurred or double vision, headaches, poor depth perception, difficulty concentrating and general fatigue during reading or near tasks.
There are two main types: convergence excess and convergence insufficiency.
Convergence Excess
Convergence excess occurs when the eyes naturally turn too far inward during close work.
A child can achieve correct alignment only by exerting extra effort, which can make reading and study uncomfortable.
Many cases are linked to long-sightedness (hyperopia). When a long-sighted child focuses harder to see clearly up close, the eyes may over-converge, creating the excess.
Reading glasses or bifocals are commonly prescribed to reduce the effort needed for focusing, relax the convergence system, as well as improve comfort and concentration during near tasks. Eye exercises are generally not effective for treating convergence excess. Convergence excess affects around 10% of school-aged children.
Convergence Insufficiency
Convergence insufficiency occurs when the eyes tend to aim too far apart during close work.
Correct alignment can be achieved, but only with extra effort.
Around 5% of children and up to 10% of adults experience convergence insufficiency, where symptoms may include eye strain, headaches, difficulty reading for long periods, words appearing to move or blur and loss of place when reading.
Convergence insufficiency is one of the most successfully treated eye-coordination problems. Eye exercises are the primary treatment and aim to train the eyes to converge efficiently without excessive effort.
A common exercise involves holding a pencil 30–40 cm from the nose, keeping the pencil clear and single, slowly bringing it closer while maintaining focus. Practise this exercise daily for a few minutes.
Spectacles may be helpful when a focusing problem is also present, but glasses alone rarely resolve convergence insufficiency.
