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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!

Forsight Vision Care logo

At Forsight Vision and Midwest Dry Eye Center, it is our highest priority to provide the best quality eye care and to ensure the health and safety of our patients, staff and our entire community. We are happy to announce that we will be reopening the office for routine eyecare starting Saturday, May 2, 2020.

We are making great efforts to keep you and your family safe and have made the following changes to address the challenges regarding COVID-19 following the CDC and AOA (American Optometric Association) guidelines.

In order to prevent any further spread of the COVID-19 (Corona Virus) we ask that you please reschedule your appointment if any of the following applies to you:

Seek medical advice if you develop symptoms, or have been in contact with a person known to have COVID-19 or if you live in or have recently been in an area with ongoing spread of COVID-19.

As a local, family-owned business, we SINCERELY appreciate each and every one of you for trusting us with your eye care. Please keep yourself and your loved ones safe during these difficult times.

We look forward to welcoming you back for your next visit.

Thank you!

Dr. Cohan, Dr. Cozzone, and the entire staff at Forsight Vision and Midwest Dry Eye Center.

Practice Protocol

Forsight Vision Care logo

At Forsight Vision and Midwest Dry Eye Center, it is our highest priority to provide the best quality eye care and to ensure the health and safety of our patients, staff and our entire community. We are happy to announce that we will be reopening the office for routine eyecare starting Saturday, May 2, 2020.

We are making great efforts to keep you and your family safe and have made the following changes to address the challenges regarding COVID-19 following the CDC and AOA (American Optometric Association) guidelines.

In order to prevent any further spread of the COVID-19 (Corona Virus) we ask that you please reschedule your appointment if any of the following applies to you:

Seek medical advice if you develop symptoms, or have been in contact with a person known to have COVID-19 or if you live in or have recently been in an area with ongoing spread of COVID-19.

As a local, family-owned business, we SINCERELY appreciate each and every one of you for trusting us with your eye care. Please keep yourself and your loved ones safe during these difficult times.

We look forward to welcoming you back for your next visit.

Thank you!

Dr. Cohan, Dr. Cozzone, and the entire staff at Forsight Vision and Midwest Dry Eye Center.