Has a depth of feeling like 3d movies because of the application of the principle of light reflection and refraction, look directly at the normal light is less clear, even invisible.
有着类似3d电影的深度感觉因为应用的光反射折射原理，平常光线直视是看不太清晰，甚至是看不见的。
The parabolic wave model is more reliable than the simple refraction model in bigger area with slowly -varying water depth.
对于港外大范围缓变地形水域，抛物型方程模型较传统的折射模型则更可靠。
Conclusion the length of axis, corneal refractive power, lens thickness, anterior chamber depth and age have certain effect on the spherical equivalent refraction.
与角膜厚度、眼压无明显的相关性。结论眼轴长度、角膜屈光力、晶状体厚度、前房深度和年龄对近视度数(等值球镜度数)均有一定的影响。
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