Jensen P K, Rask R, Olsen T
Department of Ophthalmology, Arhus University Hospital, Denmark.
Acta Ophthalmol Scand. 1995 Feb;73(1):61-5. doi: 10.1111/j.1600-0420.1995.tb00015.x.
To increase the accuracy of intraocular lens power calculation, an interface between an ultrasonic A-scanning device and a personal computer was created, allowing for an on-line interpretation of the ultrasonogram in an M-mode fashion. On the same computer display, a video recording of the movements of the transducer probe relative to the eye was inserted to obtain simultaneous information on the external alignment of the transducer probe. The precision of the experimental set-up in the measurement of intraocular distances was compared with conventional A-scanning procedures run in automatic mode. The video controlled M-mode biometry was found easy to operate and to result in reproducible axial length determination: The median value of the standard deviation was found to be below 0.04 mm as compared to a value of about 0.10 mm with conventional equipment. We concluded that video controlled M-mode biometry has great potential in the endeavour to increase the accuracy of intraocular lens calculation.
为提高人工晶状体屈光力计算的准确性，创建了一个超声A扫描设备与个人计算机之间的接口，以便以M型方式对超声图进行在线解读。在同一计算机显示屏上，插入了换能器探头相对于眼睛运动的视频记录，以获取有关换能器探头外部对准的同步信息。将该实验装置在测量眼内距离时的精度与自动模式下运行的传统A扫描程序进行了比较。发现视频控制的M型生物测量法易于操作，并且能够得出可重复的眼轴长度测定结果：标准偏差的中位数低于0.04毫米，而传统设备的值约为0.10毫米。我们得出结论，视频控制的M型生物测量法在提高人工晶状体计算准确性的努力中具有巨大潜力。
