Convergence Insufficiency
Convergence refers to the inward movement of the eyes, necessary for focusing on near objects. Convergence insufficiency means difficulty maintaining this alignment for an extended period.
The eyes manage, but at the cost of effort — and this effort manifests as asthenopic symptoms, or fatigue-related symptoms. These include fatigue while reading, headaches, occasional blurriness, or double vision, as well as difficulty maintaining attention on the text.
Symptoms worsen with prolonged near work: reading, writing, and screen time. However, they can have various causes, so diagnosis is made based on examination, not mere observation.
Convergence insufficiency is one of the indications for which orthoptic exercises are used. These are selected and conducted by a specialist, and their scope includes, among other things, expanding the range of fusion and improving convergence.
How does it work in ocu•vio?
ocu•vio does not diagnose or conduct orthoptic exercises. Instead, it provides a ready-made form of break from near work — looking into the distance, changing distances, a moment without a screen — which is beneficial to do daily.
Frequently Asked Questions
Is convergence insufficiency the same as strabismus?
No, although both issues relate to eye coordination. Strabismus is an abnormal alignment of the eyeballs, while convergence insufficiency is difficulty maintaining convergence when focusing on near objects.
Can it be recognized at home?
No. Symptoms can be similar across various disorders, so an examination is necessary.
Who diagnoses it?
An ophthalmologist or orthoptist, as part of a binocular vision examination.
Do breaks from near work matter?
They relieve the eyes regardless of diagnosis, but do not replace an examination.
Related concepts
Source: Polish Ophthalmological Society, Section of Paediatric Ophthalmology and Strabismus, Wytyczne postępowania w zezie [Guidelines on the management of strabismus], 2021.
Return to the glossary of termsThis dictionary entry serves an exclusively educational purpose. The ocu•vio platform is not a medical device as defined by legal regulations — it does not diagnose, treat, or correct vision defects or eye diseases. Digital missions and PDF materials serve a recreational and relaxing function, supporting daily digital hygiene and healthy screen habits. The content of the dictionary does not replace consultations with a specialist.