Effectiveness of placebo therapy for maintaining masking in a clinical trial of vergence/accommodative therapy.

ABSTRACT:

Purpose

To evaluate the effectiveness of the Convergence Insufficiency Treatment Trial (CITT) placebo therapy program in maintaining masking of patients randomized to the office-based treatment arms, determine whether demographic variables affect masking, and determine whether perception of assigned treatment group was associated with treatment outcome or adherence to treatment.

Methods

Patients (n = 221, ages, 9-17 years) were randomized to one of four treatment groups, two of which were office-based and masked to treatment (n = 114). The placebo therapy program was designed to appear to be real vergence/accommodative therapy, without stimulating vergence, accommodation, or fine saccades (beyond levels of daily visual activities). After treatment, patients in the office-bas

SUBMITTER: Kulp M 

PROVIDER: S-EPMC2759605 | biostudies-literature | 2009 Jun

REPOSITORIES: biostudies-literature