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Multiple Choice
Which structure within the eye holds the lens in place?
A
Suspensory ligaments (zonular fibers)
B
Cornea
C
Iris
D
Ciliary body
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Verified step by step guidance
1
Step 1: Begin by identifying the primary function of the lens in the eye. The lens focuses light onto the retina to create clear images. It must be held in place by a structure that allows it to adjust its shape for focusing.
Step 2: Examine the role of suspensory ligaments (zonular fibers). These fibers connect the lens to the ciliary body and are responsible for holding the lens in place while enabling changes in its shape during accommodation.
Step 3: Consider the cornea. The cornea is the transparent, dome-shaped surface at the front of the eye that helps focus light but does not hold the lens in place.
Step 4: Evaluate the iris. The iris is the colored part of the eye that controls the size of the pupil to regulate the amount of light entering the eye. It does not interact directly with the lens to hold it in place.
Step 5: Analyze the ciliary body. The ciliary body is a muscular structure that adjusts the tension on the suspensory ligaments, indirectly influencing the lens's position and shape but does not directly hold the lens in place. Therefore, the suspensory ligaments are the correct answer.