Certified Paraoptometric (CPO) Practice Exam

Tests that do not require responses from the patient are called objective tests. This means that the test result is based on physical measurements or observations rather than the patient's own perceptions or feelings. Therefore, options B, C, and D are incorrect because they all involve some form of patient response. Option B involves the patient's subjective perception or experience, option C involves the patient's reactions to a visual stimulus, and option D involves the patient's ability to focus and respond to different lenses during an eye exam.