摘要
Purpose:High-resolution biometry of the anterior ocular segment is now becoming more and more important against a background of refractive surgery and the evaluation of potentially accommodative lens replacement materials.The aim of this study was a systematic investigation of the currently available non-contact methods for measuring the anterior chamber depth(ACD).Methods:The ACDs of 50 phakic eyes of 27 patients aged between 19 and 59 years were measured with the IOL-Master(Zeiss),the AC-Master(Zeiss),the Pentacam(Oculus)and slit-lamp pachymetry by Jaeger(Haag-Streit).Results:The median anterior chamber depth in the investigated eyes was 3.63 mm for the IOL-Master(minimum 2.88 mm,maximum 4.22 mm),3.802 mm for the AC-Master(2.816 mm-4.373 mm),3.915 mm for the Pentacam(minimum 2.994 mm,maximum 4.614 mm)and 3.75 mm for Jaeger(2.887 mm-4.29 mm).With a probability of error of α =0.05 there were no significant differences concerning the ACD between the methods of Jaeger and AC-Master,Jaeger and IOL-Master,or Pentacam and AC-Master(Wilcoxon and Wilcox).The intra-individual variability was ± 5.4 μ m for AC-Master,± 12.7 μ m for Pentacam,± 24.5μ m for IOL-Master and± 41.2 μ m for Jaeger.The maximum method-dependent difference in ACD determination was 285 μ m.Conclusions:All the methods allow non-contact biometry,but the results might differ due to measuring principles inherent to the system,experience of the examiner and compliance of the patient.Partial coherence interferometry with the AC-Master offers the advantage of measurement exactly along the optical axis with the highest reproducibility and patient compliance.
Purpose:High-resolution biometry of the anterior ocular segment is now becoming more and more important against a background of refractive surgery and the evaluation of potentially accommodative lens replacement materials.The aim of this study was a systematic investigation of the currently available non-contact methods for measuring the anterior chamber depth(ACD).Methods:The ACDs of 50 phakic eyes of 27 patients aged between 19 and 59 years were measured with the IOL-Master(Zeiss),the AC-Master(Zeiss),the Pentacam(Oculus)and slit-lamp pachymetry by Jaeger(Haag-Streit).Results:The median anterior chamber depth in the investigated eyes was 3.63 mm for the IOL-Master(minimum 2.88 mm,maximum 4.22 mm),3.802 mm for the AC-Master(2.816 mm-4.373 mm),3.915 mm for the Pentacam(minimum 2.994 mm,maximum 4.614 mm)and 3.75 mm for Jaeger(2.887 mm-4.29 mm).With a probability of error of α =0.05 there were no significant differences concerning the ACD between the methods of Jaeger and AC-Master,Jaeger and IOL-Master,or Pentacam and AC-Master(Wilcoxon and Wilcox).The intra-individual variability was ± 5.4 μ m for AC-Master,± 12.7 μ m for Pentacam,± 24.5μ m for IOL-Master and± 41.2 μ m for Jaeger.The maximum method-dependent difference in ACD determination was 285 μ m.Conclusions:All the methods allow non-contact biometry,but the results might differ due to measuring principles inherent to the system,experience of the examiner and compliance of the patient.Partial coherence interferometry with the AC-Master offers the advantage of measurement exactly along the optical axis with the highest reproducibility and patient compliance.
出处
《世界核心医学期刊文摘（眼科学分册）》
2006年第10期37-37,共1页
Digest of the World Core Medical Journals:Ophthalmology
