By observing the shape of the pupil and its size, it is possible to learn a great deal about where major stresses are occurring in the body.
The pupil is not located in the center of the iris. It is placed nasalward and slightly down from the geometric center.
If it is small and pinched down, a condition of extreme nervous tension is indicated. Often times the use of certain drugs will give this effect. When the pupil is wide and open beyond normal, a condition of nerve depletion and exhaustion is present. The response to light is also an indication of tension or stress; therefore, the rate at which the pupil responds to light intensities is important.
Rarely is the pupil evenly round in shape. It is usually flat on one side, elliptical or oval. These aberrations in pupil tonus indicatespecific conditions in the body.
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