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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!

January 10, 2022

To All Our Established Patients,

The office of Dr. Michael J. Morris has enjoyed serving patients at our Hillview (approximately 15 years) and Shepherdsville (approximately 5 years) office locations. Due to staffing shortages and other challenges related to the pandemic, the decision has been made to cease seeing patients at these two locations effective January 15, 2022. I will start seeing established patients and new patients starting January 17, 2022 at Visionworks Doctors of Optometry, located at 4655 Outer Loop, Louisville, KY 40129). This practice is between the Red Lobster and  McAlister's Deli on OuterLoop (going toward the Jefferson Mall). I will see patients there on Mondays, Fridays, and Saturdays. I look forward to continuing to serve your eye care needs at this location.  The office number to the new location is (502) 966-2020. When calling for an appointment, please request me by name and the staff will ensure that I see you at your appointment time. In addition, the office telephone number you have contacted me at previously (502) 968-2720 will still be active for leaving messages and requesting glasses or contact lens prescription or any other information in your file. The messages will be checked daily, please allow additional time to return your calls during this time of transition.

Sincerely,

Dr. Michael J. Morris, OD

To Book Appointment with Dr. Michael J. Morris, OD, Please contact the new location at

(502)966-2020 

https://locations.visionworks.com/ll/US/KY/Louisville/4655-Outer-Loop

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Dr. Michael J. Morris, OD has moved to: Visionworks Doctors of Optometry Located at 4655 Outer Loop, Louisville, KY 40129

To Book Appointment with Dr. Michael J. Morris, OD, please contact the new location at (502)966-2020 https://locations.visionworks.com/ll/US/KY/Louisville/4655-Outer-Loop