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Tag: eye muscle problems



Eso deviation often present as a constant esotropia occurring in infancy or early childhood. Fusional divergence is used to correct for an eso deviation, however our innate divergence amplitude are typically weak. Measuring only 6 – 8 prism diopter. It is likely that our weak divergence amplitude contribute to the poor control of eso deviation. (more…)



Exo-deviation is an outward deviation which can be divided into exophoria and exotropia. Exodeviation are quite common, and they are not necessarily. A small intermittent exotropia is normal in most newborns, as 70 % of normal newborns have a transient exodeviation that resolves by 2 to 4 months of age.  Another type of exo deviation that is considered normal is a small exophoria (<10pd). (more…)