The part of the eye which helps in its accommodation is:
Ciliary muscles
An eye can focus the images of the distant objects as well as the nearby objects on its retina by changing the focal length of its lens. The ciliary muscles are capable of modifying the curvature of the lens and thereby affecting the focal length of the lens. This adjustment in focal length is called the power of accommodation of the eye. Hence, the part of the eye which helps in its accommodation is ciliary muscles.