Méndez Sánchez 2017.

Methods	Randomized controlled trial (unclear)
Participants	Inclusion criteria: residual esotropia of 20 to 30 diopters, regardless of age Exclusion criteria: not reported Number randomized: 14 cases in the botulinum toxin A group and 13 cases in the conventional surgery group
Interventions	Intervention: botulinum toxin A Comparator: conventional surgery
Outcomes	Outcomes: surgical success, complications
Notes	We attempted to contact study investigators to clarify the study design, but we did not receive any response from them.