The Clinical Interpretation of Teller Acuity Card Test in the Diagnosis of Amblyopia. |
Hae Jung Paik, Min Kyung Shin |
Department of Ophthalmology, Gachon Medical school, Ghil Medical Center, Inchon, Korea. |
약시 진단에 사용된 Teller 시력검사의 임상적 의미 |
백혜정(Hae Jung Paik),신민경(Min Kyung Shin) |
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Abstract |
PURPOSE To evaluate the clinical interpretation and application of Teller Acuity Card(TAC) test compared with optotype acuity chart in the diagnosis of amblyopia. METHODS: The visual acuities of 112 children(54 normal, 58 amblyopes), whose mean age was 6.5 years(3~11 years) were measured with Han's letter chart and TAC. The sensitivity, specificity, false-positive and false-negative rates of TAC Test were analyzed according to the visual acuity, age and type of amblyopia. RESULTS: TAC acuity was higher than optotype acuity in both strabismic and anisometropic amblyopia group, however, the anisometropic amblyopia group showed higher correlation between two tests(P<0.01,r=0.0755). The sensitivity and specificity of TAC test increased in lower visual acuity group, which means that TAC test is useful in detecting amblyopia. While the false-positive rate increased in higher visual acuity group, false-negative rate increased in lower visual acuity group and in the group less than 6 years of age. And the bilateral visual acuity were underestimated than unilateral visual acuity in about 30%. CONCLUSIONS: Though TAC test is a useful method in detecting amblyopia of infancy and childhood, an appropriate clinical diagnosis should be accompanied for the accurate diagnosis of amblyopia. |
Key Words:
Amblyopia;Anisometropia;Optotype acuity;Strabismus;Teller Acuity Card(TAC) test |
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