The Sensitivity of the Bielschowsky Head-Tilt Test in Diagnosing Acquired Bilateral Superior Oblique Paresis

What previously has been described as masked bilateral superior oblique paresis simply may be a reflection of inherent poor sensitivity of the Bielschowsky head-tilt test, the Parks 3-step test, and reversal of the hypertropia in diagnosing bilateral superior oblique paresis. Hence, none of these tests should be relied on exclusively to make this diagnosis.