Convergence Insufficiency (CI)

Convergence Insufficiency (CI) is one of the leading causes of eyestrain, blurred vision, double vision (diplopia), and/or headaches.1

Nowadays, there appears to be sufficient evidence supporting vision therapy (orthoptic therapy) for the treatment of symptomatic CI. Current studies in the form of randomized control trials (RCT) indicate that office-based therapy together with home therapy is the most effective treatment at reducing symptoms and clinical findings.2,3,4

However, the current diversity in vision therapy procedures and protocols emphasizes the need for a unified vision therapy system.1

Computerized vision therapy procedures have important advantages over traditional techniques: 1

  • An experienced practitioner is not always required to conduct the therapy.
  • Patients responses, performance and adherence are quantified, verified and monitored by the software.
  • Immediate, accurate, consistent and unbiased feedback is provided by the computer, regarding correct and incorrect responses.
  • But most importantly, computerized vision therapy allows for standardization of therapy procedures.

Remote Consultation and Treatment for CI

The Optonet Vision Unit also includes a vision therapy module specially designed to achieve the standardization goal via the Optonet Project for both Office-based and Home-based (remotely supervised) treatments.


1. Cooper, J. & Jamal, N. Convergence insufficiency-a major review. Optom. St Louis Mo 83, 137–158 (2012).
2. Scheiman, M. et al. A randomized clinical trial of treatments for convergence insufficiency in children. Arch. Ophthalmol. Chic. Ill 1960 123, 14–24 (2005).
3. Convergence Insufficiency Treatment Trial Study Group. Randomized clinical trial of treatments for symptomatic convergence insufficiency in children. Arch. Ophthalmol. Chic. Ill 1960 126, 1336–1349 (2008).
4. Scheiman, M. et al. A randomized clinical trial of vision therapy/orthoptics versus pencil pushups for the treatment of convergence insufficiency in young adults. Optom. Vis. Sci. Off. Publ. Am. Acad. Optom. 82, 583–595 (2005).

Convergence Insufficiency research information from the National Eye Institute (NIH):

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