A 4-month-old infant shows convergence and accommodation with mild esotropia of the left eye during a vision screen. What is the appropriate next step?

A 4-month-old infant shows convergence and accommodation with mild esotropia of the left eye during a vision screen. What is the appropriate next step?

• A. Patch the right eye to improve coordination of the left eye.
• B. Reassure the parents that the infant will outgrow this.
• C. Refer the infant to a pediatric ophthalmologist.
• D. Recheck the infant's eyes in 2 to 4 weeks.

Answer: (C)

Convergence and accommodation in a 4-month-old can work even when the eye is mildly crossed, but persistent misalignment at this age needs specialist evaluation to protect binocular vision and prevent amblyopia. Referral to a pediatric ophthalmologist allows a full eye exam tailored to infants: precise measurement of the deviation, assessment of ocular motility, cycloplegic refraction to identify refractive errors, and determination of appropriate treatment (such as glasses for refractive causes, patching if amblyopia is present, or surgical/other interventions if the strabismus persists). Watching and reassessment or just reassuring the parents risks missing an underlying treatable condition; a routine recheck in a few weeks isn’t enough when an infant shows even mild esotropia, since early intervention yields the best visual outcomes.

Convergence and accommodation in a 4-month-old can work even when the eye is mildly crossed, but persistent misalignment at this age needs specialist evaluation to protect binocular vision and prevent amblyopia. Referral to a pediatric ophthalmologist allows a full eye exam tailored to infants: precise measurement of the deviation, assessment of ocular motility, cycloplegic refraction to identify refractive errors, and determination of appropriate treatment (such as glasses for refractive causes, patching if amblyopia is present, or surgical/other interventions if the strabismus persists).

Watching and reassessment or just reassuring the parents risks missing an underlying treatable condition; a routine recheck in a few weeks isn’t enough when an infant shows even mild esotropia, since early intervention yields the best visual outcomes.