Evidence-Based Research of Vision Therapy

What is a Vision Therapy Doctor and Therapist?

There are two primary certification bodies in the US for vision therapy, the College of Optometrists in Vision Development (COVD) and the Optometric Extension Program Foundation (OEPF). Optometrists that achieve the highest level of certification in the field are fellows of the COVD or FCOVD, which is achieved by thorough testing and case reports that demonstrate mastery of both the science and practical application. In addition therapists are able to achieve advanced certification such as COVT or Certified Optometric Vision Therapist, which requires 2,000 hours of clinical experience under the supervision of an FCOVD Optometrist, and advanced testing.

The Research

It goes without saying that good research exists because of the extraordinary work of great scientists and researchers. Here’s a brief sampling of just some of the studies that have been conducted.

2002

In December 2002, Dr. Kenneth J. Ciuffreda of the SUNY College of Optometry in New York, studied the efficacy and scientific basis for vision therapy in the treatment of vergence and non- strabismic disorders. He assessed changes in oculomotor responsiveness in children and adults that supported general motor learning as well as vision therapy. 

2010

In 2010, Dr. Mitchell Scheiman of Salus University in Pennsylvania, Dr. Susan Cotter of the Southern California College of Optometry (SCCO) at Marshall B. Ketchum University, Dr. John Lawrenson of the City University of London, Dr. Li W. Wang of Austin, and Dr. T. Li of Bakersfield, reviewed the studies of nearly 1,300 individuals with convergence insufficiency. Amongst those tested for six weeks to six months, were children and adults from the ages of 7 to 18, 15 to 40, and 40 and older. Study results supported the benefits of vision therapy conducted in-office and reinforced improved convergence ability in children who participated in continued vision therapy at home. Research from 2019 further indicated the therapeutic benefits of accommodative therapy. 

2020

In 2020, Dr.s Kristian Borg and Berthold-Lindstedt, of the Department of Rehabilitation Medicine and Dr. J Johansson of the Department of Clinical Neuroscience, of the Karolinska Institutet, Stockholm Sweden determined that targeted vision therapy can effectively treat, improve, and reduce oculomotor deficits resulting from acquired brain injuries. 

Recognition of Vision Therapy as a Viable Treatment Option

Vision therapy has been both arduously tested and vilified since its emergence in the late 1800s. Between the 1930s and 1960s vision therapy gained more respect and acceptance as a valid part of optometric care, but the field still lacked substantial proof that it was indeed effective. In the absence of sufficient research and data, vision therapy appeared to be a good idea but not necessarily good practice.

In the early 1990s, due to the intense efforts to prove just how much vision therapy could help people of all ages experiencing any number of visual dysfunctions, the Convergence Insufficiency Treatment Trial Investigator group (CITT) was born. Through the efforts of several dedicated and determined optometrists who had seen how life changing vision therapy could be, the CITT received grants through the National Eye Institute and opportunities to conduct a variety of clinical trials were created. Ultimately, vision therapy was proven to be an effective option for treating patients both in office and at home.