Since soft contacts are made of polymer that absorbs water it is only natural that if you leave your contacts to dry (e.g. prolonged use w/o lubrication) it will stick to wherever or whatever will give it moisture in order to remain soft and flexible w/c can be unfortunate if it is your eyeball.
This can sometimes happen when you forget to keep the contact lenses moist. What happens is your eye is already moistened - when you place something dry (such as non-moistened contact lenses) into the eye, it can form a "dry-seal" which makes it harder to remove.
A more relative experience to this can be - X-mas decorations. When you get window clings you must lick one side to make them stick to the dry surface (window). Removing them is the same as removing a "dry-sealed" contact lense.
Lastly to correct this problem is simple. If your contacts are one time use - throw them away. If they are multiple use then place them back into your small contact case and moisten them using the saline solution your Opthamologist prescribed.
Its really just the water it has. Its doest litterally stick onto your iris
Where your iris and pupil are on your eye, there is a slight round bump, as shown in this picture: http://www.retinaaustralia.com.au/images/eye6.gif A contact lens is shaped precisely to the size and shape of that bump, so that when you place a contact lens in your eye, the contact lens tries to find the place that it fits around perfectly, which is over your pupil and iris.
The iris surrounds the lens.
Posterior to Iris
The iris acts like the aperture of a camera lens.
Iris
My dad is an eye doctor and the same thing happened to me... you should just wash it out well with your lens solution and it'll be fine.
Anterior
The colored part of the eye is the Iris.
iris and ciliary muscle
iris
Iris.
The ciliary body is a specialized structure which anchors the iris with the choroid. It makes aqueous humor and anchors the lens via the zonules, through which it modulates lens changes.The ciliary body is a specialized structure which anchors the iris with the choroid. It makes aqueous humor and anchors the lens via the zonules, through which it modulates lens changes.