When asked about his vision, a patient says that the last time he had it tested, his vision was recorded as 20/50 . What does this mean?
a. He can read at 20 feet what a person with normal vision can read at 50 feet.
b. He can read at 50 feet what a person with normal vision can read at 20 feet.
c. He needs to be 50 feet from objects to see them.
d. He can see objects the best between 20 and 50 feet.
A
The Snellen eye chart is read at 20 feet. The last line the patient can read with no more than two errors is recorded. This patient was able to read the 50-foot line at 20 feet, which means that he is reading at 20 feet what a person with normal vision can read at 50 feet.
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