accommodative convergence:accommodation ratio

(redirected from accommodative convergenceaccommodation ratio)

ac·com·mo·da·tive con·ver·gence:·ac·com·mo·da·tion ra·ti·o (AC:A),

the amount of convergence (measured in prism diopters of convergence) divided by the amount of accommodation (measured in diopters) required to direct both eyes on an object.