A person enter into a dark corridor from a brightly lit room. State the effect on the pupil of the eye
Answers
The pupil is a circular gap, located in the iris of the eye. The radial and circular muscles of the iris alter pupil size and control the amount of light entering the eye. This phenomenon is known as the pupillary mechanism, and is controlled by changes in light intensity and hormone concentrations. Thus if a person where to enter a dark corridor from a brightly lit room, the radial muscles would contract due to sympathetic stimulation, the circular muscles would relax and the pupil would appear larger.
It takes the pupil some time to adapt to the intensity of the ambient light, and they contract slowly.
Explanation:
- When reaching a brightly lit area from a dark hallway, a person may feel shine in the eyes.
- It's because the pupil of both the eyes is wide if the person walks in a dark hallway, and when the person reaches a brightly lit area, a wide amount of light reaches the eyes; therefore, she or he feels shine in the eyes.
- It takes the pupil some time to adapt to the intensity of the ambient light, and they contract slowly.
To know more about effect on the pupil, visit:
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