Posts Tagged ‘20/20’

Rid Yourself of Glasses and Contact Lenses

Monday, January 4th, 2010


Laser vision correction has never been more precise or more safe than it is right now at Iowa EyeCare in Robins, Iowa.  We use the best equipment in the world.  We have a world-class LASIK surgeon.  Experience now what thousands of others have already discovered.

Iowa EyeCare has teamed with TLC Laser Eye Centersto provide patients with the very best LASIK experience.  Iowa EyeCare and TLC are committed to quality.  Many patients choose us because of our lifetime guarantee

To learn more about LASIK surgery at Iowa EyeCare schedule a free LASIK consultationwith Stacey Lensch, our Laser Vision Coordinator.  Stacey may also be reached by phone at 319-294-8888.

You can also learn more by reading our previous Blog post:

Important Facts To Know About Custom Bladeless LASIK

What does the term “lazy eye” mean?

Monday, December 14th, 2009

By Dr. Dennis Francis


Dr. Dennis Francis

 I often hear patients say they have (or think they have) a lazy eye. The term “lazy eye” is actually synonymous with the medical term “amblyopia”. Amblyopia occurs when one eye fails to provide adequate vision and the brain begins to collect visual information from only the better eye. The poorer seeing eye subsequently fails to develop normally. If left untreated, amblyopia results in a best-corrected vision of worse than 20/20 and reduced binocular vision.


Amblyopia is most often a consequence of unequal glasses prescription between the two eyes or from monocular strabismus (one eye turning in or out). It is very difficult to re-train the brain once it decides not to use the amblyopic eye. Amblyopia is one of the most common causes of vision loss in children because it often arises without symptoms. Routine eye examinations play a key role in preventing vision loss from amblyopia.

The American Optometric Association and the eye doctors at Iowa EyeCare agree that even if no eye or vision problems are apparent, at about age 6 months, you should take your baby to your doctor of optometry for his or her first thorough eye examination. We can offer helpful suggestions to prevent amblyopia and, if necessary, begin treatment for any eye-related problems.


Please schedule an appointment with an eye doctor at Iowa EyeCare in Cedar Rapids, Marion, or Robins, Iowa.

What does 20/20 really mean?

Wednesday, October 21st, 2009


By Dr. Ryan W. Nelson

 Dr. Ryan Nelson






Quality of vision is most often measured using Snellen acuity.  The Snellen system uses standard letter sizes at a fixed distance of 20 feet to quantify an individual’s ability to see. For example, if you have 20/20 vision, at 20 feet you can see what the normal eye can also see at 20 feet.  Confusing?  You bet it is.  Here is another example.  If your vision is poorer, say 20/40, then the normal eye can see at 40 feet what you can only see at 20 feet. 

Some individuals are able to achieve better than 20/20 vision.  A visual acuity of 20/15 means that you can stand back at 20 feet and read the same sized letter that a normal person has to move 5 feet closer to see.  Impressed?  Did you know that the human eye has been measured to a resolution of 20/7!  

Most Snellen charts use various letters, but tumbling “E” and picture optotypes can help optometrists test the vision of young children more easily. Snellen acuity is not the only way to test vision either.  In fact, there are many methods; some even measure other aspects of vision, such as contrast sensitivity.

To test your eyes, schedule an appointment at our office today.


Iowa Eye Care Eye Chart

Iowa Eye Care Eye Chart