The validity and utility of the new classification system was confirmed. The rapid prism adaptation test is qualitatively, but not quantitatively, the same as 1 hour of monocular occlusion. This clinical study determined the presence and clinical implications of these conditions in a population of university students with heavy near visual demands. The criteria for selection were the absence of significant uncorrected refractive error, healthy eyes, and no strabismus or amblyopia. Accommodative and nonstrabismic binocular vision problems are prevalent in this population.
Accommodative excess is the most common condition.
Because these dysfunctions may have a negative effect on performance, appropriate vision evaluation for this population is important. Recently, we developed a model of binocular fixation. This model predicts the amount of cyclovergence as a function of target elevation and horizontal target vergence. The version and the vergence components are characterized by a common primary direction for the two eyes. We applied this model to data of patients with intermittent exotropia.