Purpose: The purpose is to study the effects of the vision training, as a non-surgically treated vision therapy, on the objective and the subjective symptoms of the patients with intermittent exotropia combined with vertical deviation. Method: For the boys at the age of eight with intermittent exotropia, who report a long-distance blurred vision, dazzling, and intermittent diplopia more than ten times a day, the vision training had been practiced for seven weeks. The objective and subjective symptoms have been examined after six months from the end of the training. Results: The objective and the subjective symptoms have been improved after the seven weeks training and the improvements lasted after six months from the end of the treatment. Conclusion: Non-surgical treatment for the patients with intermittent exotropia, including intermittent exotropia combined with vertical deviation like this case, should be considered as an auxiliary treatment and on the preferential basis.