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  • Title: Accuracy of the Lang II stereotest in screening for binocular disorders in 6-year-old children.
    Author: Huynh SC, Ojaimi E, Robaei D, Rose K, Mitchell P.
    Journal: Am J Ophthalmol; 2005 Dec; 140(6):1130-2. PubMed ID: 16376664.
    Abstract:
    PURPOSE: To assess the accuracy of the Lang II stereotest in screening for strabismus, amblyopia, and anisometropia in 6-year-old children. DESIGN: Cross-sectional population-based study. METHODS: The Sydney Myopia Study examined 1765 6-year-old children (78.9% of eligible) who were identified by random cluster sampling of 34 schools in Sydney, Australia. Sensitivity and specificity of the Lang II stereotest was determined by best stereoacuity. Cycloplegic autorefraction, assessment of visual acuity, and ocular motility were conducted. RESULTS: Test sensitivity ranged from 21.4% for anisometropia (> or =1.0 diopter) to 31.3% for amblyopia. The detection rate for new cases of amblyopia ranged from 20% to 40%; the detection rate for new cases of strabismus was 30%. Specificity was >98% in all three conditions. Children with false-negative results included newly diagnosed cases of strabismus (14 of 25 children) or amblyopia (5 of 12 children). CONCLUSION: The Lang II stereotest, when used alone, has very limited value as a screening test of binocular dysfunction.
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