Which term does NOT mean the same thing as the others?

• A. Monofixation syndrome
• B. Microsquint
• C. Consecutive ET
• D. Micro ET

Answer: (C)

All three of the first terms describe tiny, inherent misalignments that relate to how the eyes coordinate and how binocular vision is organized. Monofixation syndrome is a small, persistent deviation accompanied by suppression and abnormal retinal correspondence, so fusion is limited but the misalignment remains stable. Microsquint and Micro ET both refer to very small esodeviations that are hard to detect with casual testing, yet they reflect a small, non-acquired misalignment.

Consecutive esotropia is different: it’s an inward turn that appears after surgery to correct exotropia, an acquired postoperative consequence rather than a naturally occurring tiny deviation. Because of that cause and timing, it doesn’t fit with the idea of stable, small-angle misalignments seen in the other terms.