Affected Superior Canal htDVA across Groups. Group 1 = Age- matched normal control, right superior canal, 2 = Pre-SCD surgical repair, 3 = Post-SCD Surgery Acute, 4 = Post-SCD Surgery Non-acute. Mean (solid line) = 0.0755, +1 standard deviation = 0.142 and +2 standard deviation = 0.208 (hashed lines) from age-matched normal control group, right superior canal, superimposed for direct comparison.