Have your partner focus on an object on the far side of the room (e. g., the chalkboard or a chart) for 1 minute. Then have your partner switch focus to an object in your hand (e. g., a pencil). Watch your partner's pupils carefully as the point of focus is changed from far to near.

Explanation:

Pupil changes its shape when the eye focuses on near or far object. When we observe something far away, the pupil gets widen. But when we look at something near to us, pupil get smaller. So, pupil adjust itself according to the focus of our eye. If the partner switches from far to near, the pupil changes from wide to small. Pupil changes its shape according to bright as well as dim light also.

you know that this symptom is misleading and quite often is related to: heart attack

a heart attack is a condition that occurs when the blood flow that transports oxygen to the heart muscle is damaged or cut off completely. the coronary arteries that supply the heart muscle with blood flow can be blocked by the accumulation of plaque. also, when the plaque within the heart artery breaks, it creates blood clot that can also hinder the blood flow. men that are over 45years of age and women that are over 55years of age are at risk of having a heart attack. the symptoms of a heart attack include chest discomfort, chest pain, coughing, and shortness of breath.