An apparatus and method for determining an eyesight age is provided to provide a user with an entertainment function by determining the eyesight age of the user through simple manipulation of an input module and displaying the result of the determination to the user. A storage module(140) stores at least one test image and age-specific response information for the at least one test image. A control module(120) receives user adjustment information indicating a variation in the at least one test image, and determines an eyesight age of a user based on the user adjustment information and the age-specific response information. An output module(130) outputs the determined eyesight age. The age-specific response information comprises information indicating a relationship between a correct answer probability regarding the at least one test image and a pixel value of the at least one test image.
