A method for performing an assessment of vision is provided, and comprises: determining a current difficulty level for the assessment; displaying a question of the assessment, the question including a visual element that has a movable pattern, the movable pattern having at least one variable attribute that is related to the current difficulty level; in response to receipt of an inputted answer, determining whether the inputted answer is correct; and determining whether the assessment is to be concluded, and in the affirmative, generating a result of the assessment based on the current difficulty level.