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—We examined the characteristics of two groups of patients: those who underwent unilateral recession-resection and those who had bimedial rectus recession for childhood esotropia. The possibility of bias due to differences in preoperative variables was discussed in our article, and was taken into consideration when our conclusions were made.Retrospective studies alone seldom provide sufficient evidence to document the superiority of a particular therapeutic approach. Nevertheless, they do offer a relatively quick and inexpensive means of identifying and quantitating differences in outcome. This information is useful in determining whether a prospective, randomized clinical trial would be desirable and feasible. We agree that such a trial conducted according to a standardized protocol would provide the best evidence concerning whether unilateral recession-resection or bimedial rectus recession is the "better" operation.
Bartley GB, Dyer JA, Ilstrup DM. Childhood Esotropia-Reply. Arch Ophthalmol. 1985;103(7):889-890. doi:10.1001/archopht.1985.01050070015005