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T. Tachikawa, I. Goto, M. Matsubara, T. Hayashi, K. Nishio, Y. Fukuma, K. Negishi, K. Ohno, T. Noda; Evaluation of Simultaneous Binocular Autorefractometry in Normal and Refractive or Anisometropic Amblyopia . Invest. Ophthalmol. Vis. Sci. 2003;44(13):4836.
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Purpose: To evaluate refractive measurements using a newly developed simultaneous binocular autorefraction device and to compare the measurements with those obtained using a conventional monocular autorefractometer. Subject and Methods: The refractive values of both eyes before and after cycloplegia were measured with the simultaneous binocular autorefractometer (BV1000, Topcon) and compared with those obtained using a conventional monocular autorefractometer (KR8100A, Topcon). Children with refractive amblyopia without strabismus who had been treated with corrective spectacles and occlusion therapy (refractive amblyopia, 14 cases, 28 eyes, 4-9 years old; anisometropic amblyopia, 10 cases, 20 eyes, 3-13 years old); children without amblyopia (19 cases, 38 eyes, 3-14 years old) and adults (10 cases, 20 eyes, 25-45 years old) were evaluated. After measuring the corrected visual acuity and ocular position, we measured the objective refractive values before and after instillation of 1% cyclopentolate using the two devices. With the BV1000, refractions of both eyes were measured simultaneously during an auto-fogging process under binocular-fusional status with auto-alignment functions separately for both eyes. Results: In both groups of children with and without amblyopia, the difference between the pre- and post-cycloplegic refractive values was significantly smaller using the BV1000 measurement compared with that using the KR8100A value (p<0.05). In the children with and without amblyopia, regarding the disparity between both eyes, the differences between the pre- and post-cycloplegic measurements varied less with the BV1000 measurement compared with the KR8100 measurement analyzed by ANOVA, even though the difference did not reach statistical significance. In the adults, no significant difference was found between the BV1000 and KR8100A measurements. Conclusion: In children, refractive values obtained using the BV1000 were closer to the refraction far point than those using the KR8100A. In children with refractive and anisometropic amblyopia, the variation in bilateral disparity was smaller with the BV1000 than with the KR8100A.
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