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Posted by / 06-Nov-2017 01:14

The ciliary muscles are responsible for the lens accommodation response.Convergence is the ability of the eye to simultaneously demonstrate inward movement of both eyes toward each other.By adjusting the focal length, the eye is actually changing its lens power as well isn’t it? You will notice that objects in the background tend to get blurry. Keep your finger in front of your face but focus on something in the background. If the object in consideration is at a distance, for the image to form at the retina, the focal length has to be large.

The focal length cannot be altered after a certain limit. Learn all about the accommodating power of the eye with our expert faculty only at BYJU’s.

The process by which certain muscles (called ciliary muscles) function, to change the focal length of the eyes so that the image is clearly formed on the retina is called the accommodation of the eye. You can actually put this power of your eye to test.

This will vary for near and distant objects and also for objects moving away or towards the eye. Keep your finger in front of you and try to focus only on the finger. So how does this accommodating power work considering varying distances?

But to focus on nearby objects the ciliary muscles contract making the eye lens thick.

As a result the focal length of the eye lens decreases and we see the nearby objects.

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The ciliary muscle constricts making the lens thicker, shortening its focal length.

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