What to Do When Amblyopia Treatment and Corrective Lenses Fail to Control Infantile Constant Exotropia
Infantile exotropia is a constant outward deviation of the eyes with onset before 6 months of age. Initial management targets fusional control and reduction of the deviation angle through non-surgical means — but when those goals are not reached, a defined next-line intervention is indicated.
Clinical Scenario
Infantile (constant) exotropia with onset before 6 months of age. This condition shares many characteristics with infantile esotropia, including limited binocular potential, and requires early clinical attention.
Why the Previous Treatment Was Insufficient
The first-line approach — treatment of amblyopia (if present) and correction of any clinically significant refractive error with corrective lenses — aimed to improve fusional control and decrease the angle of the exodeviation. When these goals are not achieved, escalation to the next level of management is required.
Next-Line Approach (Overview Only)
Early extraocular muscle surgery is indicated to improve sensory outcomes. The procedure involves targeted intervention on the lateral rectus and, in selected cases, the medial rectus — with the specific technique and surgical plan detailed in the full structured protocol.
References
DOI: 10.1016/j.ophtha.2022.11.002
Infantile exotropia appears before 6 months of age and is a constant exotropia that has many characteristics similar to infantile esotropia, including limited binocular potential, oblique muscle dysfunction, latent nystagmus, and dissociated vertical deviation.
For constant infantile-onset exotropia, early surgery is indicated to improve sensory outcomes, although normal binocular function is rarely achieved.
Surgery consists of bilateral-lateral rectus-muscle recessions or unilateral-lateral rectus-muscle recession and medial rectus-muscle strengthening.
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