眼的屈光不正,用普通的框架眼镜矫正,较为简单,更换镜片也容易,是大家熟知之事,但镜架固定在鼻梁和耳朵上,会有不快之感。由于镜片与角膜之间,存在一定的距离,会产生透镜的象差问题或三棱镜效应。远视眼镜视物放大,近视眼镜视物缩小,在温湿环境里,可凝上一层雾气,使视力模糊不清。而角膜接触镜薄而小,无框架,直接贴附在角 Eye refractive errors, with ordinary glasses frame correction, simpler, easy to change lenses, is a well-known matter, but the frame fixed in the nose and ears, there will be unpleasant feelings. Due to the lens and the cornea, there is a certain distance, will produce the lens aberration problem or prism effect. Focal hyperopia visual material enlargement, myopia glasses visual reduction, in warm and humid environment, can condense on a layer of fog, blurred vision. The contact lens thin and small, no frame, directly attached to the corner