Accuracy of the Lang II stereotest in screening for binocular disorders in 6-year-old children.
OBJECTIVE
To assess the accuracy of the Lang II stereotest in screening for strabismus, amblyopia, and anisometropia in 6-year-old children.


METHODS
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).


CONCLUSIONS
The Lang II stereotest, when used alone, has very limited value as a screening test of binocular dysfunction.
Huynh
Son C
SC
Centre for Vision Research, Department of Ophthalmology and Westmead Millennium Institute, University of Sydney, Hawkesbury Road, Westmead, NSW 2145, Australia.
Ojaimi
Elvis
E
Robaei
Dana
D
Rose
Kathryn
K
Mitchell
Paul
P
D000550:Amblyopia / Q000175:diagnosis*; D015858:Anisometropia / Q000175:diagnosis*; D002648:Child; D003430:Cross-Sectional Studies; D005188:False Negative Reactions; D005260:Female; D006801:Humans; D008297:Male; D011237:Predictive Value of Tests; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013285:Strabismus / Q000175:diagnosis*; D015351:Vision Screening / Q000295:instrumentation* / Q000379:methods; D015348:Vision, Binocular; D014792:Visual Acuity