NBCSN Nationally Certified School Nurse Practice Exam 2025 - Free School Nurse Certification Practice Questions and Study Guide

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What is the normal vision range for healthy eyesight?

20/30-20/40

20/10-20/25

The normal vision range for healthy eyesight is typically defined as 20/20 vision, which indicates that a person can see clearly at 20 feet what should normally be seen at that distance. The range that is considered to be healthy eyesight usually falls around 20/10 to 20/25. Individuals with 20/10 vision can see better than average, while those with 20/25 still have eyesight that is considered to be within the range of normal vision.

In contrast, the other ranges provided indicate varying degrees of visual impairment. For example, 20/30 to 20/40 vision suggests that a person sees at 20 feet what a person with normal vision can see at 30 to 40 feet, which indicates a slight degree of vision impairment. Ranges like 20/50-20/60 and 20/100-20/200 indicate progressively worse visual acuity, suggesting more significant visual impairment and potential legal blindness at 20/200. Therefore, the range of 20/10-20/25 reflects the best understanding of healthy eyesight in the general population.

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20/50-20/60

20/100-20/200

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