If a child confuses look-alike words, we can't remediate the situation by relying on "business as usual" methods. Methods used previously may have contributed to the problem in the first place. Therefore, even though confused words are a subset of common sight words, we can't use methodology typically used to teach children sight words; we need to use procedures especially appropriate for the situation. Fortunately, much recent attention has been paid indirectly to this problem.
Schell, L. M. (1984). Teaching Confused Words. Reading Horizons, 25 (1). Retrieved from http://scholarworks.wmich.edu/reading_horizons/vol25/iss1/4