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眼屈光不正在我军眼病中是第二个多发眼病。眼屈光不正对完成军事行动有诸多影响,这一问题随着军队机械化和现代化程度的提高,就越来越明显。因此,根据屈光不正发生的规律,采取积极措施防止屈光不正之发生,是我们部队军医的注意事项之一。一、屈折与调节(一)物理光学:光线自光源发出,在真空里依直线方向前进,每秒钟它的速度是三十万公里。一切物体诸如气体,流体或固体,无论肉眼看是透明的或不透明的,都是光的间质(或叫媒质),光与任何间质相接触时都要发生三种变化,一部分被间质表面所反射,一部分被吸收,而另部分则透过间质。如间质的表面十分光滑如镜面,则光线被反射的部分较多;如间
Eye refractive errors in our military eye is the second multiple eye disease. Refractive eye reflexes have had many effects on the completion of military operations, a problem that becomes increasingly evident as the military is mechanized and modernized. Therefore, according to the law of ametropia, to take active measures to prevent the occurrence of refractive errors, is one of our military medical considerations. First, inflection and regulation (A) Physical optics: light emitted from the light source, in a vacuum in a straight line, its speed is 300,000 km per second. All objects, such as gases, fluids or solids, are transparent or opaque both to the naked eye and are interstitials of light (or media). Three changes occur when light comes into contact with any interstitial matter, Reflected on the surface, one part is absorbed, and the other part is through the interstitial. If the interstitial surface is very smooth, such as the mirror, the light is reflected in the more part;