Accommodation of eye : Itis the adjeustment of the eye to see near and far object.

When the object is near, ciliary muscles in the eye contract and suspensory liagament becomes loose. As a result, lens becomes more convex and focal length of lens decreases.

If the object is away the ciliary muscles expand. 
 The focal length of lens increases and convexity decreases.

This process of adjustment of eye to the near and far objects is called accommodation of eye.