Split lengthening of the inferior oblique muscles

Split lengthening of the inferior oblique muscle(s) was performed in 20 patients for the correction of V-pattern, employing bilateral or unilateral surgery. In four patients unilateral split lengthening of the inferior oblique was done for the correction of hypertropia. The average correction of V-pattern was 16.9 pd with bilateral surgery and 13.3 pd with unilateral surgery. The average correction of hypertropia was 11.8 pd with only unilateral surgery.