Comparison of anterior chamber depth measurement between IOL master and ultrasound biomicroscopy(UBM)

周文凯   张劲松

中国医科大学眼科医院   110005

PURPOSE：To compare the measurement of anterior chamber depth(ACD)inclusive of corneal thickness using IOL master and ultrasound biomicroscopy(UBM)and evaluate the repeatability of each method.

METHODS：two consecutive measurements of anterior chamber depth were prospectively performed using IOL master and UBM in 60 eyes in 60 individuals.Mean values were compared using the paired T test.For each individual，anterior chamber depth measurements was performed 5 times to estimate the repeatability of each method by a coefficient of variation.

RESULTS：The mean anterior chamber depth was 2.964±0.127mm with the IOL master and 2.963±0.125 mm in UBM.This difference was not statistically significant(P=0.362).The coefficient of variation was 0.56%±0.26%and 0.65%±0.36%in IOL master and UBM，respectively.

CONCLUSIONS：The mean anterior chamber depth of IOLmaster was the same as UBM.Both methods were precise.The repeatability of IOL master is better than UBM.The IOL master seems to be a useful and more convenient method to measure anterior chamber depth espcally for intraocular lens implantation.