science
Grade6
Easy
Question
The size of the lens is controlled by the ___.
- Retina
- Iris
- Ciliary muscles
- Cornea
Hint:
The size of the lens is controlled by the ciliary muscles.
The correct answer is: Ciliary muscles
- The circular structure is the ciliary body that is an extension of the iris, the colored part of the eye. The ciliary body produces fluid in the eye called aqueous humor. It also contains the ciliary muscles that change the shape of the lens when it focuses on nearby objects.
- The main function of the ciliary muscle is to change the shape of the lens and change its focal length to coordinate the imaging of far and near objects on the retina.
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