Importance of ocular dominance
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. This may be especially important in sports which require aim, such as archery, darts or shooting sports.
It has been asserted that cross-dominance (in which the dominant eye is on one side and the dominant hand is on the other) is advantageous in sports requiring side-on stances (e.g. baseball, cricket, golf); however, recent studies have shown this not to be the case. In a study of professional baseball players, hand-ocular dominace patterns did not show an effect on batting average or ERA. Similarly, a recent South African study found that "cricketers were not more likely to have crossed dominance" than the normal population.
Ocular dominance is an important consideration in predicting patient satisfaction with monovision correction in cataract surgery, refractive surgery, and contact lens wear.