A decompensated phoria is more commonly associated with which type of deviation?

• A. Non-Comitant Deviation
• B. Comitant Deviation
• C. Isotropic Deviation
• D. Mixed Deviation

Answer: (B)

Decompensation of a phoria means the fusional vergence can no longer hold the latent misalignment from becoming manifest, so a tropia appears. The resulting deviation is typically comitant, meaning the amount of misalignment stays roughly the same in different directions of gaze. This pattern reflects a vergence-control problem rather than a change in the muscular pull with gaze direction. Incomitant deviations, which vary with where you look, point to nerve palsies or mechanical restrictions rather than a simple loss of fusional vergence. The other terms aren’t standard descriptors for this scenario, so the best fit is a comitant deviation.