自动验光仪PowerRefractor临床使用的准确性:一项比较性研究

Accuracy of the autorefractor PowerRefractor in clinical work-A comparative study(Germ)

Background: The aim of this prospective study was to investigate accuracy and efficiency of the autorefractometer PowerRefractor compared to established autorefractometers and retinoscopy as standard method. Patients and Methods: 150 patients (300 eyes) were examined. Patients were initially (pupil not influenced) analyzed with the Power Refractor (PRneutral). After that a examination followed under standardized Cyclopentolat cycloplegia with the Power Refractor (PRcyclo), the hand-held Retinomax K-plus (Nikon), the table-top mounted RK-5 (Canon) and retinoscopy. Results: Deviation from retinoscopy (percentage of values with more than 1 dpt difference/maximal deviation): Sphere: PRneutral: 66,3%/8,5 dpt; PRcyclo: 48%/5 dpt; RK-5: 26,7%/4,75 dpt; Retinomax K-plus: 6,735/1,25 dpt; Cylinder: PRneutral: 12%/6,25 dpt; PRcyclo: 21%/4,75 dpt; RK-5: 1,3%/2,75 dpt; Retinomax K-plus: 2,3%/2,5 dpt; spherical equivalent: PRneutral: 44,7%/7,1 dpt; PRcyclo: 35,3%/5,4 dpt; RK-5: 9%/4,5 dpt; Retinomax K-plus: 1,3%/1,4 dpt; error of entire refraction: PRneutral: 62,7%/7,8 dpt; PRcyclo: 61,3%/7,3 dpt; RK-5: 24%/4,5 dpt; Retinomax K-plus: 14,735/3,6 dpt Conclusions: The best accuracy compared to retinoscopy had Retinomax K-plus followed by RK-5. PowerRefractor had the biggest deviations of the tested devices. PowerRefractor may be a usefull device for screening small children and handicapped people because of the one meter observing distance. For a precise refraction especially in children a retinoscopy under cycloplegic conditions is still necessary.

Background： The aim of this prospective study was to investigate accuracy and efficiency of the autorefractometer PowerRefractor compared to established autorefractometers and retinoscopy as standard method. Patients and Methods： 150 patients （300 eyes） were examined. Patients were initially （pupil not influenced） analyzed with the Power Refractor （PRneutral,） . After that a examination followed under standardized Cyclopentolat cycloplegia with the Power Refractor （PRcyclo）, the hand-held Retinomax K-plus （Nikon）, the table-top mounted RK-5 （Canon） and retinoscopy. Results： Deviation from retinoscopy （percentage of values with more than 1 dpt difference/ maximal deviation）.