Refractive error changes in children with intermittent exotropia under overminus lens therapy.
OBJECTIVE
Intermittent exotropia may be decreased by stimulation of accommodative convergence. Once excessive accommodation has been related to myopia, our objective was to evaluate refractive errors changes in children under overcorrecting minus lens therapy.


METHODS
A retrospective chart review of 21 children with intermittent exotropia was performed. All patients were treated with occlusion, and a 13-patient subset of them received overminus lens therapy (group A). Eight children received spectacles as necessary (group B). Initial age, age interval, initial spherical equivalent (SE), and magnitude of overcorrection were considered as co-variables of the mean variation in refractive error (SE of each eye) between groups, through a multivariate analysis.


RESULTS
Overcorrection used in group A ranged from 0.5 D to 3.5 D (2.46 +/- 0.87 D). Although initial SE of each eye was significant different between group A and B (OD - p=0.02; OS - p=0.01), initial age (p=0.69), age interval (p=0.90), and mean variation in refractive errors (p=0.36) did not differ between groups. Multivariate analysis with linear regression showed no significantly difference regarding all co-variables enrolled.


CONCLUSIONS
Treatment of intermittent exotropia with overcorrecting minus lens did not induce refractive errors changes, even considering age, treatment period, initial spherical equivalent and overcorrection magnitude used.
Paula
Jayter Silva de
JS
Department of Ophthalmology, Otorhinolaryngology and Head and Neck Surgery, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo - USP, Ribeirão Preto, SP, Brazil. jspaula@fmrp.usp.br
Ibrahim
Fuad Moraes
FM
Martins
Marcia Clivati
MC
Bicas
Harley Edison Amaral
HE
Velasco e Cruz
Antonio Augusto
AA
D002648:Child; D002675:Child, Preschool; D004812:Epidemiologic Methods; D005099:Exotropia / Q000503:physiopathology / Q000628:therapy*; D005139:Eyeglasses; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D009907:Optometry; D012030:Refractive Errors / Q000503:physiopathology / Q000628:therapy*; D013997:Time Factors