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Dear Valued Patient, our office is OPEN and We’re Here for YOU!
We never closed during the COVID-19 shutdown, we just practiced safety protocols.

At Optometric Associates, the health and safety of our patients and employees is our top concern. Our office has a long-standing practice of disinfecting all areas of our office throughout the day, and all clinic areas are disinfected prior to every patient seen.

Our team is committed to the eye health and well-being of our patients and our community. Our office is providing ALL routine eye care services, including eye emergency care, glaucoma management, dry eye management, contact lens examinations, glasses examinations, medication refills, eyeglass repairs, and the dispensing of contact lenses.

Please contact our office at 717-354-2020 or text us prior to your visit to communicate your needs. Because we are running on a slightly reduced clinic schedule, please double check our hours of operation before visiting. Feel free to contact us with any questions. Thank you.

Optometric Associates Team
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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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Optometric Associates, New Holland, Pa. from David D. Speace on Vimeo.