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Percentages of patients with motor success in the two treatment groups at different moments of the follow up after retreatment (months). Motor success is defined as deviation of 0-8 prism dioptres by the simultaneous prism and cover at 6 metres. The percentages observed are similar in the two groups at 6 months (p=0.72), 1 year (p=0.50), and 3 years (p=0.72). The stability of the motor success rates over the follow up is noticeable.
