Certified Paraoptometric (CPO) Practice Exam 2025

What term describes the ability to maintain visual focus on an object with both eyes producing a single visual image?

1. Binocular vision

2. Stereo vision

3. Monocular vision

4. Depth perception

The correct answer is: Binocular vision

The term that describes the ability to maintain visual focus on an object with both eyes producing a single visual image is binocular vision. This occurs when both eyes work together to perceive visual information, allowing the brain to create a single image from the slightly different perspectives of each eye. This is crucial for tasks that require depth perception and spatial awareness. While stereo vision is related to how we perceive depth and three-dimensionality, it specifically refers to the brain's ability to interpret the different angles of view from each eye. Monocular vision refers to the use of only one eye, which does not provide the same level of depth perception as binocular vision. Depth perception is the result of various visual cues, including both binocular and monocular inputs, but it doesn't define the ability to focus visually using both eyes as a unified system. Thus, the best answer aligns directly with the definition of maintaining a focused visual image through both eyes working in tandem.