Question

A person timing the moonrise looks at her watch and then at the rising moon. Describe what happened inside her eyes that allowed her to see her watch clearly one second and then see the moon clearly.

a) Accommodation of the lens.

b) Contraction of the pupil.

c) Change in the shape of the cornea.

d) Adjustments in the rods and cones.

Answer 1

The person can see a watch and then the moon clearly due to the accommodation of the lens in their eyes.

Step-by-step explanation:

The person has the ability to see a watch clearly one second and then see the moon clearly because of the accommodation of the lens in their eyes. Accommodation is the process by which the eye adjusts the shape of the lens to focus on objects at different distances.

When looking at a nearby object like a watch, the ciliary muscles surrounding the lens contract, thickening the lens and increasing its converging power to focus the light from the object onto the retina. When looking at a distant object like the moon, the ciliary muscles relax, flattening the lens and decreasing its converging power to focus the light from the object onto the retina.