Which of the following statements is true? a. contraction of the ciliary muscles is required for myopic individuals to clearly see distant objects. b. relaxation of the ciliary muscles is required for hyperopic individuals to clearly see nearby objects. c. contraction of the ciliary muscles is required for hyperopic individuals to clearly see distant objects. d. all of the listed responses are true

The statement that says ''Contraction of the ciliary muscles is required for hyperopic individuals to clearly see distant objects'' is true. The correct answer is C.

Explanation:

Hyperopia is an eye defect that causes the lack of sharpness or blurred vision of nearby objects as a result of focusing the images behind the retina and not directly on it. When hyperopia is considerable, you can have blurred vision at any distance, near or far. However, a hypermetropic person can focus the image on the retina thanks to an intraocular muscle, the ciliary muscle, which is located behind the iris and is primarily responsible for the focusing mechanism of the eyes. These muscles allows to modify the curvature of the lens, thus compensating the inability of the hypermetropic eye to correctly modify the path of the light rays and focus them on the retina. The contraction of the entire ciliary muscle exerts a traction effect forward of the anterior choroid and performs the main function of relaxing the resting zonular tension in the lens equator to allow for accommodation. With the passage of time, the possibility of focusing thanks to this muscle is gradually being lost.

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