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Visual Acuity
- Position the patient 20 feet in front of the Snellen eye chart.
- Allow the patient to use their glasses or contact lens if present.
- Have the patient cover one eye at a time with a card.
- Ask the patient to read progressively smaller letters until they can go no further.
- Record the smallest line the patient read successfully (20/20, 20/30, etc.)
- Repeat with the other eye.