Guyton D L
Am J Optom Physiol Opt. 1982 Oct;59(10):800-14. doi: 10.1097/00006324-198210000-00006.
The SR-IV refractor has a spherocylindrical optometer system which provides smoothly variable dioptric power of +/- 20.00 D sphere and +/- 8.00 D cylinder. A split-field monitoring system and joy stick permit three-dimensional alignment. A simultaneous-view cross cylinder system provides distortion-free side-by-side comparison of cross cylinder choices for cylinder refinement incorporates automatic sphere compensation during cylinder power refinement and automatic selection of axis steps during axis refinement. A special astigmatic dial and +/- 0.50 D cross cylinders are provided for low vision refractions. Visual acuities are printed as well as the refined refractive findings at either spectacle or contact lens vertex distance.
SR-IV验光仪具有球柱面验光系统，可提供±20.00D球镜和±8.00D柱镜的平滑可变屈光力。分视场监测系统和操纵杆可实现三维对准。同步视交叉柱镜系统可提供无失真的并列比较，用于柱镜优化，在柱镜屈光力优化过程中包含自动球镜补偿，在轴位优化过程中自动选择轴位步长。还提供了特殊的散光视标盘和±0.50D交叉柱镜用于低视力验光。可打印视力以及在眼镜或隐形眼镜顶点距离处的精确屈光结果。
