I have tired eyes from mild convergence insufficiency. are there other options beside expensive in office therapy or shady looking websites?

Exercises or glasses: Convergence excises such as near point focussing performed several times daily can strengthen your convergence , your other choice would be reading glasses with weak prisms to alleviate symptoms they would be prescription and not over the counter.

Pencil pushups: What I like to tell my patients with convergence insufficiency is to try doing pencil pushups to strengthen the muscles of the eye involved in convergence. Instructions are found in the article below. Best of Luck. http://www.livestrong.com/article/107694-perform-pencil-pushups/