[11] Eye dominance has been categorized as "weak" or "strong";[12] highly profound cases are sometimes caused by amblyopia or strabismus.
[citation needed] In normal binocular vision there is an effect of parallax, and therefore the dominant eye is the one that is primarily relied on for precise positional information.
In a 1998 study of professional baseball players, hand–ocular dominance patterns did not show an effect on batting average or ERA.
[18] The study suggests this difference may be a potential, and possibly treatable, cause of dyslexia; however, further tests are required to confirm this.
[21] There are a number of ways to do this: Forced choice tests of dominance, such as the Dolman method, allow only a right or left eye result.