By what age should ophthalmologic referral be considered for intermittent infantile esotropia (eyes crossing) that persists?

By what age should ophthalmologic referral be considered for intermittent infantile esotropia (eyes crossing) that persists?

• A. 2 months
• B. 4-6 months
• C. 9-12 months
• D. 18 months

Answer: (B)

When infantile eye alignment remains intermittent but does not resolve by around four to six months, a formal ophthalmology evaluation is warranted. Early childhood is a critical period for developing binocular vision, and persistent intermittent esotropia increases the risk of amblyopia and abnormal sensory fusion if not checked. A referral at four to six months allows a timely assessment of refractive error, ocular motility, and alignment, and it opens the door to appropriate management—whether optical correction, observation if it’s likely to resolve, or surgical planning if the deviation persists. Waiting longer, such as nine to twelve or eighteen months, misses an opportunity to protect vision and guide treatment while the visual system is still plastic. Extremely early referral at two months is often unnecessary because transient immaturity of fusion can still be refining at that age.

When infantile eye alignment remains intermittent but does not resolve by around four to six months, a formal ophthalmology evaluation is warranted. Early childhood is a critical period for developing binocular vision, and persistent intermittent esotropia increases the risk of amblyopia and abnormal sensory fusion if not checked. A referral at four to six months allows a timely assessment of refractive error, ocular motility, and alignment, and it opens the door to appropriate management—whether optical correction, observation if it’s likely to resolve, or surgical planning if the deviation persists. Waiting longer, such as nine to twelve or eighteen months, misses an opportunity to protect vision and guide treatment while the visual system is still plastic. Extremely early referral at two months is often unnecessary because transient immaturity of fusion can still be refining at that age.