双目间接眼底镜可以使眼科医生看到一个真实,明亮、立体的眼底倒像。但因其价格较贵、体积较大,所以在一定程度上限制了它的使用范围。笔者用钢笔手电筒配合市售放大镜,可以完成间接眼底检查,现介绍如下。材料和方法1.材料:①普通钢笔手电筒一支,注意挑选聚光力强的灯珠。②市售普通放大镜。用镜度计检查其屈光度在+20±1D。去掉把柄,即成一圆形凸透镜。另从眼镜店购一直径6.5cm+14D 毛坯镜片,镶上保护边备用。 Binocular indirect ophthalmoscope allows ophthalmologists to see a real, bright, three-dimensional inverted fundus. However, due to its price is more expensive, larger, so to some extent limits its scope of use. I use a pen and flashlight with a commercially available magnifier, you can complete the indirect fundus examination, are presented below. Materials and methods 1. Materials: ① ordinary pen flashlight, pay attention to the selection of strong light beads. ② ordinary commercial magnifying glass. Using a mirror to check the diopter at +20 ± 1D. Remove the handle, into a convex lens. The other from the optical shop to buy a diameter of 6.5cm + 14D blank lens, set the protection side standby.