Knoll H A
Br J Physiol Opt. 1976;31(4):1-10.
A detailed description of the Ophthalmetron is given. This is an automatic refractometer using the principle of infra-red retinoscopy and having a sensitivity range from -18.00 D to +17.00 D with a resolution of 0.25 D. By means of a rapid light scan across the patient's pupil the instrument determines the direction of motion of the retinal reflex in all meridians and a movement null-point is determined electronically. Results are then plotted automatically on a chart drum. Some early validation studies have shown the Ophthalmetron to provide a refraction end-point in good agreement with conventional retinoscopic findings. The paper concludes with an appendix in which the features of three commercially available automatic refractometers are compared.
文中对眼屈光仪进行了详细描述。这是一种自动验光仪，采用红外视网膜检影原理，灵敏度范围为-18.00 D至+17.00 D，分辨率为0.25 D。通过快速扫过患者瞳孔的光线，该仪器可确定所有子午线方向上视网膜反射的运动方向，并通过电子方式确定运动零点。然后结果会自动绘制在记录鼓上。一些早期的验证研究表明，眼屈光仪提供的验光终点与传统视网膜检影结果高度一致。本文结尾附有一个附录，比较了三种市售自动验光仪的特点。
