Which test is used to measure tear flow?

The Schirmer Test is specifically designed to measure tear production, which is essential for diagnosing conditions like dry eye syndrome. During this test, small strips of filter paper are placed under the lower eyelid to absorb tears. The amount of wetting on the strips after a specified time (usually 5 minutes) indicates the level of tear flow. A low level of moisture can indicate insufficient tear production, helping healthcare professionals determine the appropriate treatment.

In contrast, the other tests mentioned serve different purposes. The Fluorescein Test involves using a special dye to assess the surface of the eye and identify any corneal damage or dryness but does not specifically measure tear flow. The Intraocular Pressure Test measures pressure within the eye, which is crucial for diagnosing conditions like glaucoma, rather than focusing on tear production. Meanwhile, the Visual Acuity Test evaluates the clarity of vision but does not relate to tear flow or ocular moisture levels.