In horizontal gaze to the right, the right lateral rectus and which muscle of the left eye are yoked?

• A. Left Superior Rectus
• B. Left Medial Rectus
• C. Left Lateral Rectus
• D. Left Inferior Rectus

Answer: (B)

Conjugate horizontal gaze relies on yoked muscle pairs in opposite eyes working together. When you look to the right, the right eye moves outward via the right lateral rectus, and the left eye moves inward toward the nose via the left medial rectus. These two muscles contract together to produce a smooth rightward gaze. The left medial rectus is the correct paired muscle because it provides the inward pull needed by the left eye to match the right eye’s outward movement. The other options don’t produce the same horizontal, conjugate movement: they either move the eye vertically or move the left eye away from the midline, which wouldn’t align gaze to the right.