What does convergence insufficiency look like to the strabismologist

Convergence insufficiency (CI) is commonly described as the inability to bring both eyes together on a near target. Patients with CI often have symptoms such as headaches, asthenopia, difficulty reading or doing tasks at near, or diplopia. The clinical findings of abnormal near points of convergence, decreased fusional amplitudes and phorias or tropias can help to make a diagnosis, however not all patients will have all findings.