Strang N C, Gilmartin B S, Gray L S, Winfield N R, Winn B
Department of Optometry, University of Bradford, England.
Curr Eye Res. 2000 Mar;20(3):190-4.
To investigate the influence of method of measurement and refractive error on the open-loop accommodation response.
Open-loop accommodation was measured in darkness (dark accommodation, DA) and using a pinhole pupil (pinhole accommodation, PA) in emmetropic subjects (EMMs, n = 63), subjects with late-onset myopia (LOMs, n = 50) and subjects with early onset myopia (EOMs, n = 51). Further a control experiment examined the differences between DA and bright-field accommodation (BA) conditions in a subset of subjects. All measurements of open-loop accommodation were carried out monocularly using a Canon R1 infra-red optometer in static recording mode. All myopic subjects were fully corrected using soft contact lenses.
A significant variation (p < 0.001) in open-loop accommodation was found between DA and PA, but no variation in open-loop level was observed between the three refractive groups. There was no interaction between these two factors. No significant difference was found between the BA level and DA level in any of the refractive groups.
Open-loop accommodation response positions vary according to the experimental conditions employed during measurement. No refractive group differences in the open-loop response were apparent.
研究测量方法和屈光不正对开环调节反应的影响。
在正视眼受试者（n = 63）、迟发性近视受试者（n = 50）和早发性近视受试者（n = 51）中，于黑暗环境下（暗适应调节，DA）和使用针孔光阑时（针孔调节，PA）测量开环调节。此外，在部分受试者中进行了一项对照实验，研究DA和明视场调节（BA）条件之间的差异。所有开环调节测量均使用佳能R1红外验光仪在静态记录模式下单眼进行。所有近视受试者均使用软性隐形眼镜进行完全矫正。
DA和PA之间的开环调节存在显著差异（p < 0.001），但三个屈光组之间的开环水平无差异。这两个因素之间没有相互作用。在任何屈光组中，BA水平和DA水平之间均未发现显著差异。
开环调节反应位置根据测量期间采用的实验条件而变化。开环反应中未观察到屈光组差异。
