【摘要】 ①目的　测量正常儿童视觉系统的调制传递函数 (MTF) ,研究MTF的生物物理学意义。②方法　用竖直正弦条形光栅刺激 ,用心理物理学方法检测。③　结果MTF曲线呈倒U字形 ,峰值位于 2 .91c/deg附近。④结论　用MTF评价视功能较视力表视力方法更为科学 ,信息更为丰富。更多还原

【Abstract】 Objective To measure the modulation transfer function (MTF) of visual system, and study on the biophysics meaning of the MTF in normal children. Methods Stimulated by vertical grating of sinusoidal bar, and the MTF was measured with psychophysical methods. Result The MTF curve showed a inverse-”U” shape and the maximum value of the curve was at 2.91c/deg approximately.Conclusion It is more scientific in method and more abundant in meaning that to evaluate the visual function of human eyes with MTF than that with the eye chart vision.更多还原