Certified Paraoptometric (CPO) Practice Exam 2025

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Prepare for the Certified Paraoptometric Exam with our comprehensive quiz featuring multiple-choice questions. Each question is accompanied by hints and explanations, helping you build your knowledge and confidence. Get ready to excel in your career!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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What is the role of the lacrimal duct in the eye?

To produce tears
To regulate eye pressure
To drain tears
To support photoreceptors

The correct answer is: To drain tears

The role of the lacrimal duct in the eye is to drain tears. Tears are produced by the lacrimal glands and are essential for keeping the surface of the eye moist, providing lubrication, and removing debris. Once tears are produced, they spread across the eye surface during blinking and eventually collect in the lacrimal puncta, which are small openings located at the inner corners of the eyelids. From there, the tears travel through the lacrimal ducts into the nasal cavity, helping to maintain proper tear levels and prevent overflow onto the face. This drainage system is crucial for maintaining eye health and comfort, as it ensures that any excess tears are efficiently removed.