Certified Paraoptometric (CPO) Practice Exam 2025 – All-in-One Study Guide to Ensure Exam Success!

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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

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.

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To support photoreceptors

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