Bates’ Guide to Physical Examination and History Taking Practice Test

Question: 1 / 400

If a patient has a visual acuity of 20/100 in her left eye, what does this indicate about her vision?

She obtains a 20% correct score at 100 feet.

She can accurately name 20% of the letters at 20 feet.

She can see at 20 feet what a normal person could see at 100 feet.

The indication of a visual acuity of 20/100 in a patient's left eye signifies that she can see at 20 feet what a person with normal vision can see at 100 feet. This metric is a standardized way of measuring visual acuity where the first number refers to the distance from which the patient's vision is tested, and the second number represents the distance at which a person with normal vision can see the same detail. Consequently, a visual acuity of 20/100 means that the patient's vision is worse than that of a person with normal vision; she must be at a closer range to see what someone with normal acuity perceives from a farther distance.

Understanding this concept is crucial for healthcare providers in assessing the severity of a patient's visual impairment and aids in planning interventions or referrals to specialists if necessary.

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She can see at 100 feet what a normal person could see at 20 feet.

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