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If you are asked to refract a patient that another professional is managing for their binocular vision anomaly you should exchange information on your findings with that professional. This is important because of the close relationship between accommodation and convergence and the effect that changes in prescription can have on the patient’s deviation. 
If you have doubts about the effect a change in prescription may have on the patient’s ocular muscle status you should liaise with the co-managing professional before deciding what to prescribe.