A patient has 8 CRXT and their subjective angle is 6 XT. What type of correspondence do they have?

• A. Unharmonious correspondence
• B. HAC (objective = angle of anomaly)
• C. PAC 1
• D. PAC 2

Answer: (A)

In this kind of question, you’re looking at how the brain’s sensory mapping (the angle of anomaly) compares to the actual eye alignment measured clinically (the objective angle). The objective angle is what the eyes are doing motorically; the subjective angle is what the patient perceives or reports. The difference between these two angles defines the angle of anomaly. If they don’t match, you have anomalous correspondence; the pattern of mismatch tells you the type.

Here, the objective exotropia is 8 XT, but the subjective deviation is 6 XT. The two measurements disagree, so there is anomalous correspondence. Because the subjective angle is smaller than the objective angle, this is unharmonious correspondence—a discordant sensory mapping where the perception and the motor deviation aren’t in perfect alignment.

If the subjective and objective angles were the same, you’d have a harmonious (or complete) anomalous correspondence. The other terms (partial anomalous correspondence, etc.) describe different patterns of adaptation, but they’re not indicated by this specific 8 XT vs 6 XT discrepancy.