两眼向前平视，经瞳孔中心做一水平线井延伸过内、外眦，再经瞳孔中心做该水平线之垂直线，并延伸过上，下眼眶，将眼区分成4个象限。再将每一个象限分成两个相等区，即8个象限，区域相等，此8个相等区就是8个经区。

划区时，人仰卧头向北、脚向南。自左眼的西北方按顺时针方向依次为1、2、3、4、5、6、7、8八个区域(图1)；自右眼的东北方按逆时针方向依次为1、2、3、4、5、6、7、8八个区域(图2)。

With the eyes looking forward, draw an imaginary horizontal line passing through the pupil and beyond the inner and outer canthus. From the pupil, draw a line perpendicular extending beyond the both infraorbital and supra-orbital margins, and dividing the eye into four quadrants. Further divide each quadrant into two equal sections, forming 8 sections of equal area. These eight sections are the eight meridian zones. 

When dividing the sections, the patient should lie face up with the head pointing north. On the left eye, the first section starts from the northwest and rotates clockwise for the remaining seven sections respectively (Fig. 1); on the right eye, the first section starts from the northeast and rotates counter clockwise for the rest of the sections respectively(Fig. 2).

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