Fitzke F W, Hayes B P, Hodos W, Holden A L, Low J C
J Physiol. 1985 Dec;369:33-44. doi: 10.1113/jphysiol.1985.sp015886.
Scheiner's principle has been used in electroretinographic optometry to refract the photoreceptor plane in different regions of the visual field of the pigeon eye. Along the horizon and in the upper visual field the eye is emmetropic, or nearly so. Below the horizon the eye becomes progressively more myopic at more negative elevations, refractive state falling to -5D at -90 deg. Lower field myopia is not an artifact of oblique astigmatism, nor of an aberration symmetrical about the optical axis. It is suggested that lower field myopia is a biological adaptation suited to keep the photoreceptors in the upper retina conjugate with the ground. Refractive state below the horizon can be fitted with a sine function by varying a parameter H (eye-ground height). The value of H agrees well with directly measured eye-ground height.
谢纳原理已被用于视网膜电图验光中,以对鸽眼视野不同区域的光感受器平面进行屈光测量。在水平方向和上视野中,眼睛是正视的,或近乎正视。在水平以下,随着高度变得更负,眼睛逐渐变得更加近视,在-90度时屈光状态降至-5D。下视野近视既不是斜散光的假象,也不是关于光轴对称的像差。有人认为,下视野近视是一种生物适应性变化,有助于使上视网膜中的光感受器与地面保持共轭。通过改变参数H(眼-地高度),水平以下的屈光状态可以用正弦函数拟合。H值与直接测量的眼-地高度非常吻合。