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If a patient has a distance vision of 20/50, it means:

Option 1: He can see the Snellen chart clearly at 50 feet.
Option 2: He is legally blind.
Option 3: He can see at 20 feet what others can see at 50 feet.
Option 4: He can see at 50 feet what others can see at 20 feet.

Answer :

Final answer:

Having a distance vision of 20/50 means that the individual can see at 20 feet what a person with normal vision can see at 50 feet. This does not qualify them as legally blind (which is 20/200 vision) and doesn't relate to seeing a Snellen chart clearly at 50 feet.

3: He can see at 20 feet what others can see at 50 feet

Explanation:

The correct answer to the question, 'If a patient has a distance vision of 20/50, what does it mean?' is option 3: He can see at 20 feet what others can see at 50 feet. This is based on the standard visual acuity measurement system using a Snellen chart. A person with normal vision typically has a 20/20 score, signifying that they can see at 20 feet what any person with normal eyesight would also see at 20 feet. In comparison, if a person has a 20/50 visual acuity, they would need to be 20 feet away from an object that a person with normal vision could see clearly from 50 feet away.

This does not indicate the patient as being legally blind as defined by the legal and medical standards. Legal blindness is usually classified as having a visual acuity of 20/200 or worse. Therefore, a vision of 20/50 does not qualify as legal blindness (option 2). In addition, while the Snellen chart is used, it does not mean that they can see it clearly at 50 feet (option 1). They also can't see at 50 feet what others can see at 20 feet (option 4).

Learn more about Visual Acuity here:

https://brainly.com/question/2507061

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