The physiological manifestation of myopia is error of refraction.
近视在生理上表现为屈光不正。
Objective:Research the curative effects of myopia and error of refraction in callans by the ophthalmic acupuncture.
目的：观察眼针治疗青少年近视屈光不正的疗效。
One source of error is refraction, the bending of light beams as they pass through air layers of different temperature and pressure.
误差的一个来源是折射，即光束通过不同温度和压力的空气层时发生的弯曲现象。
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