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Treatment with prism glasses for overcorrection after surgery for exotropia in children
Author(s) -
Chang H.R.
Publication year - 2017
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.2017.0t052
Subject(s) - prism , medicine , exotropia , prism adaptation , surgery , ophthalmology , strabismus , optics , physics , neglect , nursing
Purpose To determine the effect of prism glasses and factors affecting treatment in children wearing prism glasses for overcorrection after surgery for exotropia. Methods The medical records of 43 patients who wore prism glasses for overcorrection after exotropia surgery and were followed up more than 1 year were reviewed retrospectively. Patients with overcorrection after surgery for exotropia were treated with occlusion of one eye and correction of hyperopia, and the prism glasses were prescribed if esotropia persists. The strength of prism glasses was adjusted based on alignment. We evaluated the effect of prism glasses according to the starting age of prism glasses, type of surgery, refractive error, occlusion after wearing prism glasses and overcorrection of the strength of prism glasses. Results Twenty one patients (48.8%) took off prism glasses. Among 22 patients who still wear prism glasses, the strength of prism was decreasing in 10 patients, maintained in 8 patients and increased in 4 patients. Only 1 patient underwent surgery for consecutive esotropia. In patients who began to wear prism glasses under the age of 10, the rate of took off prism glasses or the rate of decreased in the strength of prism was higher than in patients who began to wear prism glasses aged 10 or older (p=0.007). All patients who underwent unilateral recession and resection took off prism glasses or decreased the strength of prism glasses (p=0.026). Conclusions Among 43 patients who needed prism glasses to treat overcorrection after exotropia surgery, 72% took off prism glasses or decreased the strength of prism glasses. Only 1 patient needed second surgery for consecutive esotropia. Treatment with prism glasses for overcorrection after exotropia surgery is very useful and can lower the frequency of second surgery.