The Aging Effect on the Color Perception : Does aged person observe everything yellowrish?

有人说，上了年纪的人看到的东西都变黄了，因为他眼球里的晶状体变黄了。我打算在助学金资助下，利用电脑显示器测量老年人的彩色视觉MTF特性，用于科研。用于测量的图案必须没有亮度差异，只有颜色（色调）差异。然而，如果颜色改变，亮度也随之改变。本文将亮度定义为仪器测量的亮度。相反，人的亮感被定义为亮度。在开发颜色设计之前，用闪烁法确定了仪器的亮度与人的亮度几乎相同。然后，在本研究中，亮度被用于推测。这意味着颜色和亮度是由计算决定的。本文研究了如何在一个图案中设计出保持均匀亮度的各种颜色。第一种方法是先确定计算机中的默认值R（红色）、G（绿色）和B（蓝色），然后在保持相同亮度的情况下计算颜色坐标。第二种方法是确定最理想的颜色（颜色坐标），从而在保持相同亮度的情况下计算R， G和B的默认值。使用这些确定的颜色，测量了老年人与年轻人的颜色MTF倾向，并得出结论，他们之间的颜色视觉没有差异。

It has been said that an aged person observes everything yellowish because his lens in the eyeball becomes yellow. I intended to measure the color visual MTF properties of the aged person using a computer display under the financial help of Grand-in-aid for scientific research. The patterns used for the measurement must have no luminance difference but only color (hue) difference. However, if color changes, luminance also changes subordinately. In this paper, luminance is defined as brightness measured by an instrument. On the contrary, brighten sensation of human being is defined brightness. In advance of development color design, luminance of an instrument was confirmed as almost same as brightness of human being by flicker method. Then, in this investigation the luminance was used for speculation. It means color and brightness are determined by calculations. This investigation presents how to design the various colors keeping uniform luminance in a pattern. First method is that defaults values : R (red), G (Green) and B (Blue) in a computer, are initially determined, and then calculate color coordinates under keeping same luminance. Second method is that the most desirable color (color coordinates) are determined, consequently, the defaults values of R, G and B are calculated under the keeping same luminance.Using these determined colors, color MTF propensities were measured for an aged person in comparison with young subjects and concluded that there is no different in color vision among them.