HEALTH & MEDICINE CALCULATOR
2020 Vision Calculator
A precise tool.
What is the 2020 Vision Calculator & How does it work?
The 20/20 vision test is a standard eye chart used to measure visual acuity. It assesses how well you can see at a distance of 20 feet (6 meters). The letters on the chart decrease in size from top to bottom, and each line represents a different level of detail that your eyes can distinguish.
text{Visual Acuity} = frac{20}{text{Smallest Line Readable}}
VA = Visual Acuity, SLR = Smallest Line Readable
A score of 20/20 indicates normal vision. If you can read the 20/15 line, your vision is better than average (20/15). Conversely, if you can only read the 20/40 line, your vision is worse than average (20/40).
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Frequently Asked Questions
What does 20/20 vision mean?
20/20 vision means you can see clearly at a distance of 20 feet what should normally be seen at that distance.
How do I use this calculator?
Enter the smallest line on the eye chart that you can read clearly. The calculator will then determine your visual acuity.
What if I can’t read any lines on the chart?
If you can’t read any lines, your vision is worse than 20/20, and the result will be greater than 20.
Is there a difference between 20/20 and 20/15 vision?
Yes, 20/15 vision means you can see at 20 feet what people with normal vision can see at 15 feet.
Can this calculator be used for both adults and children?
This calculator is generally used for adults. Children’s vision tests may use different charts or scales.
What should I do if my test result is not 20/20?
If your result is not 20/20, it’s a good idea to schedule an eye exam with an optometrist or ophthalmologist.
How often should I get my eyes checked?
It’s recommended to have regular eye exams every 1-2 years, or more frequently if you have vision problems or risk factors.
Results are for informational purposes only and do not constitute professional advice.