Which of the following is NOT associated with Infantile ET?

Which of the following is NOT associated with Infantile ET?

• A. Overacting inferior obliques (OIO)
• B. Skew deviation
• C. Disassociated vertical deviation (DVD)
• D. Latent nystagmus

Answer: (B)

Infantile esotropia is a congenital, large-angle inward deviation that often comes with other binocular dysfunctions seen early in life. The usual accompanying signs reflect this early disruption of alignment: overaction of the inferior obliques, a disassociated vertical deviation that appears when fusion is disrupted, and latent nystagmus that becomes evident when fusion is broken. Skew deviation, by contrast, is a vertical misalignment caused by brainstem or cerebellar pathways and typically points to a central neurologic cause rather than a primary infantile horizontal strabismus. So, skew deviation is the feature not associated with infantile esotropia.

Infantile esotropia is a congenital, large-angle inward deviation that often comes with other binocular dysfunctions seen early in life. The usual accompanying signs reflect this early disruption of alignment: overaction of the inferior obliques, a disassociated vertical deviation that appears when fusion is disrupted, and latent nystagmus that becomes evident when fusion is broken. Skew deviation, by contrast, is a vertical misalignment caused by brainstem or cerebellar pathways and typically points to a central neurologic cause rather than a primary infantile horizontal strabismus. So, skew deviation is the feature not associated with infantile esotropia.