The patient is standing 10 feet from the eye chart but can only read what a person with normal vision could see from 200 feet away. What does the nurse document about the patient's vision?

Visual acuity is measured using the Snellen chart, which compares the distance at which a patient can read letters to the standard distance a person with normal vision can read the same letters. It reflects the clarity and resolving power of the retina and central visual pathways. Rationale: A. 20/200 indicates the patient can read at 20 feet what a person with normal vision can read at 200 feet. This represents severe visual impairment consistent with significant reduction in visual acuity. The ratio is standardized with 20 feet as the testing distance. B. 200/10 reverses the standard Snellen notation format. Visual acuity is always expressed with the testing distance (20 feet) as the numerator. This option is not clinically valid and does not represent correct ophthalmologic documentation. C. 10/200 incorrectly uses 10 feet as the testing distance, which is not standard for Snellen chart interpretation. It does not reflect the correct ratio definition and therefore is not an accepted visual acuity measurement format. D. 200/20 incorrectly reverses numerator and denominator values. This would imply abnormal scaling opposite of Snellen convention. It does not represent proper documentation of visual acuity and is not clinically interpretable.