Answer :
Final answer:
Distance Visual Acuity (DVA) of 20/50 feet suggests that what a person with normal vision can see accurately at 50 feet (15.24 meters), another person can only see clearly from 20 feet or 6.10 meters. Option C is correct.
Explanation:
The distance visual acuity (DVA) is a measure of the clarity of vision and is expressed as a fraction - the numerator represents the distance at which an individual can clearly identify a particular object, while the denominator represents the distance at which a person with normal vision can identify the same object.
Therefore, a DVA of 20/50 feet implies that what a person with normal vision can see clearly from 50 feet away, a person with a DVA of 20/50 can only see clearly from 20 feet away.
To convert feet into meters, we use the conversion factor of 1 foot = 0.3048 meters. Therefore, a distance that a person with normal vision can see clearly from 50 feet will be 50 feet * 0.3048 meters/foot = 15.24 meters.
Hence, the equivalent distance in meters for a DVA of 20/50 feet would translate into what a normal person can see at the length of 15.24 meters, the person with a DVA of 20/50 could only see clearly at a much shorter distance (less than 15.24 meters). Based on the conversion ratio, the equivalent of 20 feet in meters would be 20 * 0.3048 = 6.10 meters, which is not an option in your multiple choices.
However, comparing the given options, the closest would be (C) 5.85 meters.
Learn more about DVA here:
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