Reduction of asthenopia in patients with convergence insufficiency after fusional vergence training.

摘要: Seven patients with convergence insufficiency and related asthenopia underwent automated fusional training. A matched-subjects control group crossover design was used to reduce placebo effects. All showed significant increases in vergence ranges concurrent marked reduction of symptoms after a flattening an increase the base-out portion their fixation disparity curve. Our results demonstrated effectiveness training reducing these patients. Subsequent accommodation using traditional orthoptic procedures yielded further asthenopia, as well range.