The Snellen chart is used to test visual acuity during a cranial nerve examination by presenting standard Roman letters in varying sizes.
The Snellen chart is used during a cranial nerve examination to test visual acuity. It involves presenting standard Roman letters in different sizes to assess a person's ability to see them at a specified distance, typically 20 feet. The results are expressed as a fraction, such as 20/20 or 20/60, indicating the clarity of vision compared to a person with normal acuity.
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