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Authors
KULP, MARJEAN TAYLOR OD, MS, FAAO; BORSTING, ERIC OD, MS, FAAO; MITCHELL, G LYNN MAS, FAAO; SCHEIMAN, MITCHELL OD, FAAO; COTTER, SUSAN OD, MS, FAAO; COOPER, JEFFREY OD, MS, FAAO; ROUSE, MICHAEL OD, MS, FAAO; LONDON, RICHARD MA, OD, FAAO; WENSVEEN, JANICE OD, PHD, FAAO THE CONVERGENCE INSUFFICIENCY TREATMENT TRIAL (CITT) INVESTIGATOR GROUP

Feasibility of Using Placebo Vision Therapy in a Multicenter Clinical Trial

publication date
December 3, 2007
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Abstract/Introduction

Purpose

The Convergence Insufficiency Treatment Trial (CITT) Investigator Group conducted a preliminary study assessing the effectiveness of home-based push-up therapy and office-based vision therapy/orthoptics for the treatment of convergence insufficiency (CI). The CITT group developed a placebo therapy program that was designed to simulate real vision therapy/orthoptics. The purpose of this paper is to evaluate the effectiveness of this placebo therapy program in maintaining masking of subjects randomized to the office-based treatment arms (real or placebo).

Methods

Subjects (ages 9 to 30 years) were enrolled, stratified into two groups by age, and then randomly assigned to one of three treatment groups: pencil push-up therapy, office-based vision therapy/orthoptics, or office-based placebo vision therapy/orthoptics. At the end of treatment, subjects in the two office-based therapy groups (placebo and real) were asked: (1) which treatment do you think you received? and (2) how sure are you about your answer?


Conclusion/Results

Results

Ninety-five percent of subjects assigned to real therapy and 83% assigned to placebo therapy thought they were in the real therapy group. Of the subjects who thought they received real therapy, 90% assigned to real therapy and 89% assigned to placebo therapy were “somewhat sure,” “pretty sure,” or “very sure” of their answer. Those assigned to real therapy had more responses in the “very sure” category.

Conclusion

The CITT placebo therapy program was effective in maintaining subject masking in this multicenter clinical trial.


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At Amplify with Dr Wernick I was seeking help for seemingly intractable, probably age-related dryness. I've seen other doctors about it, and that has been helpful, but what he explained to me about it and the careful way he answered all my questions gave me so much more of a clear understanding of what is going on (and is not) that I am more able to implement all his and others' recommendations than I was before. And he gave me additional resources for further follow-up. I am most grateful.


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Steve Fay

Dr. Kavner is a gifted diagnostician and orthoptic therapist. He treated me several decades ago for a condition similar to dyslexia. I was having migraines five times per week. I worked with him for about a year and I experienced tremendous improvement (down to 3-4 per year) that has lasted.


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Dr. Kavner recommended two types of eye therapy for my daughter. One of them using bio-feedback. In just three sessions she is seeing considerably better. She shouted this morning: Ooh my God! I could not see these letters with my glasses on, and now I can see them without my glasses. If you are willing and able to invest in improving your vision, this is a good place to go to!


Peter G.

Dr. Kavner recommended two types of eye therapy for my daughter. One of them using bio-feedback. In just three sessions she is seeing considerably better. She shouted this morning: Ooh my God! I could not see these letters with my glasses on, and now I can see them without my glasses. If you are willing and able to invest in improving your vision, this is a good place to go to!


Kinkie F.

I have always found Dr Kavner's work, expertise and wisdom of the highest caliber. As one of the fathers of OT, occupational othomology, his depth and breadth of knowledge about the eyes' health and wellbeing of the patient is exemplary. Cannot say enough good things about him.


Allen B.
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