title: Critical period for restoration of normal stereoacuity in acute-onset comitant esotropia.
abstract: We conducted a retrospective study of 25 patients with acute-onset comitant esotropia to evaluate whether the timing of the start of treatment is a critical factor in the development of normal stereopsis. The mean age at onset was 12 years 4 months, and mean age at the start of treatment was 17 years 9 months. Bifixation was defined as a stereoacuity threshold score that was numerically lower than 60 seconds of arc on stereotesting. An operation was performed on the nonfixating eye for the prism-adapted angle. At the final examination, bifixation was observed in four patients (16%) with the Randot test and in 15 patients (60%) with the Titmus test. No relationship was found between the time of the start of treatment and the postoperative development of stereopsis, nor was there a significant (P > .10) difference between the two groups with early and delayed start of treatment in the proportion of patients with bifixation.
authors.affiliation: Department of Ophthalmology, Okayama University Medical School, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Ohtsuki
authors.forename: S
authors.initials: S
authors.lastname: Hasebe
authors.forename: R
authors.initials: R
authors.lastname: Kobashi
authors.forename: M
authors.initials: M
authors.lastname: Okano
authors.forename: T
authors.initials: T
authors.lastname: Furuse
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D003867:Depth Perception / Q000502:physiology*; D004172:Diplopia / Q000150:complications; D004948:Esotropia / Q000503:physiopathology / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D012189:Retrospective Studies; D013997:Time Factors; D015348:Vision, Binocular; D014792:Visual Acuity / Q000502:physiology*