Question

A person is reading a book in a shaded area. The person then looks up and observes an eagle flying in the

bright sky at a distance. Explain the changes that occur in the pupil and the lens of the eye.

Answer 1

Answer:

When a person looks up from reading a book in a shaded area to observe an eagle flying in the bright sky at a distance, several changes occur in the pupil and the lens of the eye in order to allow for clear vision of the distant object.

The pupil, which is the opening in the center of the iris that regulates the amount of light that enters the eye, will begin to constrict in response to the increased amount of light entering the eye. This is due to the action of the iris muscles, which cause the pupil to become smaller in bright light and larger in dim light. The smaller pupil size helps to reduce the amount of light entering the eye, thereby preventing an excessive amount of light from reaching the sensitive retina at the back of the eye.

Additionally, the lens of the eye will begin to change shape in order to focus the light from the distant object onto the retina. The lens is made up of elastic tissue and is attached to muscles that can change its shape. When we look at distant objects, the ciliary muscles in the eye relax, causing the lens to become flatter and thinner. This change in shape allows the lens to refract the incoming light at a greater angle, which helps to focus the light onto the retina and produce a clear image of the distant object.

Overall, the changes in the pupil and the lens of the eye work together to adjust the amount of light entering the eye and focus the light onto the retina, allowing for clear vision of distant objects.

Answer 2

When the person looks up to observe the eagle, the pupil of the eye will constrict in order to reduce the amount of light entering the eye. This is done to protect the retina from being overexposed to bright light. At the same time, the lens of the eye will become more curved in order to focus on the distant object. This process is known as accommodation and allows the person to see clearly.

Step-by-step explanation: