[citation needed] Diagnosis of convergence insufficiency is made by an eye care professional skilled in binocular vision dysfunctions, such as an optometrist, ophthalmologist, or orthoptist to rule out any organic disease.

The patient brings a pencil slowly to within 2–3 cm (0.79–1.18 in) of the eye just above the nose about fifteen minutes per day five times per week.

Patients should record the closest distance that they could maintain fusion (keep the pencil from going double as long as possible) after each five minutes of therapy.

[8] A later study of 2012 confirmed that orthoptic exercises led to longstanding improvements of the asthenopic symptoms of convergence sufficiency both in adults and in children.

As a result of the eyes not converging on the same point for sustained periods of time when reading, words can appear blurry or double because the brain is receiving two different images.

Children struggling with symptoms such as letters appearing blurry or double and experience tiredness or headaches when reading should consult an optometrist.

[15] In studies that used standardized definitions of convergence insufficiency, investigators have reported a prevalence of 4.2–6% in school and clinic settings.