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Snellen Chart

Hopefully by now, we’ve all seen one. The projected or wall-mounted Snellen eye chart, usually topped by the big letter “E”, is a common visual acuity test used to measure your sharpness of vision at multiple distances.
 
Arranged as a pyramid of sorts, the letters in the Snellen chart are specifically chosen and arranged to test your sharpness and clarity of vision at a baseline distance of 20 feet. During a visual acuity test, the Snellen eye chart is viewed as a projection, or mounted on a wall.
 
Handheld versions of Snellen charts are used for testing near vision as well.
 
By viewing or reading each line from top to bottom (with one eye covered at a time), your eye doctor can gain a general approximation of the quality of your visual acuity, or sharpness. Where a line of characters begin to become difficult to see is the approximate measurement of your vision.
 
The Snellen chart serves as a beginning—not an end—to a comprehensive eye examination.

What does “20/20” vision mean?

Snellen charts help to determine a baseline for your vision in each eye—a baseline typically measured against “20/20” vision. This means when you are 20 feet away from an object, you can comfortably see details that most people with normal vision can also see at 20 feet distance.
 
If you have 20/30 vision, that means what you see comfortably at 20 feet, can be seen by a person with “normal” vision at 30 feet. Your vision is weaker, in other words.
 
Conversely? In the rare instances where vision may test better than normal on a Snellen chart, a value of 20/10 vision means that you can see clearly from a distance of 20 feet, what a person with normal vision sees well at a distance of 10 feet. Make sense?
 
In fact, if you look closely at a Snellen eye chart, you’ll see the vision values associated with measuring your vision on the right or left side of each line of characters.
 

Special thanks to the EyeGlass Guide, for informational material that aided in the creation of this website. Visit the EyeGlass Guide today!

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Miller Vision plans to be open for eye emergencies, and non-routine care.10am – 2pm starting March 23rd.The CDC has recommended all routine eyecare to be postponed.

Steps our Practice is taking:

To our Patients:

*If you have recently traveled outside of the US, or have had close contact with someone who has, or if you have a fever, cough or other symptoms of acute respiratory distress, please call our office to reschedule your visit.

*We do expect this to be an ongoing situation in our area for an extended period of time and do not want our patients to neglect their eye care needs during this time.

*Please call us with any questions or concerns, and if you feel it is best for you or your family member to reschedule your appointment, feel free to do so.

*Please minimize the number of family members and other individuals that enter the office with you for the exam.

Telehealth is now available.

TEXT NEED APPOINTMENT to 336-989-7880.

You will receive a link for a video appointment with Dr. Miller.