This is a very interesting and important question.  Yes, uveitis can result from injury to the eye such as a blunt force to the eye or a foreign body in the eye. This usually results in iritis, which is inflammation of the colored part of the eye that surrounds the pupil.  The iris is also one  part of the eye that is typically inflamed in uveitis associated with JIA. There is also information from laboratory experiments suggesting that trauma in a joint can result in changes in certain molecules in the cornea of the eye (a part of the eye which is not primarily involved in uveitis associated with JIA).  More research needs to be done to understand how trauma to the eye or in the joint might be associated with chronic uveitis as is seen in association with JIA.